7 Best Non-Toxic Microwave Steamers Free of BPA, Reviewed

For this comprehensive review, I personally tested each of these non-toxic microwave steamers in my own kitchen. I steamed everything from crunchy broccoli to delicate fish to see how they performed. When product details were unclear, I contacted brands directly to verify their materials and certifications.

Sadly, not all BPA-free microwave steamers in 2025 are actually safe and healthy. Many are made from cheap plastics that still contain harmful chemicals. BPS is a known endocrine disruptor, often used as a BPA replacement. Phthalates, which are linked to developmental problems, can leach into food. PVC is another major concern, as it can release toxic fumes when heated. Heat, steam, and moisture can cause these chemicals to migrate into your food.

Because of this, I only focused on non-plastic microwave steamers. The safest options are 100% food-grade silicone and glass steamers, which are the most inert and non-toxic choices.

In this guide, I’ll also cover how to choose the right microwave vegetable steamer for your needs and share tips for getting the best results when steaming in the microwave.

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Let’s start from the basics: Are microwaves safe for cooking your food? Does it destroy vitamins and nutrients?

Microwaving food doesn’t automatically destroy nutrients. What really matters is how you cook it. Some studies have found that microwaving can reduce certain plant compounds, like flavonoids in broccoli, especially if too much water is used. But other research shows that microwaving can actually preserve nutrients better than boiling or steaming, thanks to shorter cooking times and less water exposure.

One study even found that microwaving broccoli for just one minute retained more flavonoids than steaming. Another study comparing frozen meals found that the microwaved version kept slightly more vitamin C than the oven-baked one. A 2023 report even confirmed that among boiling, steaming, and microwaving, microwaving was the most effective for retaining nutrients across different vegetables. The key takeaway? Nutrient loss depends on the food, cooking time, and water content—not the microwave itself.

Overall, microwaving is one of the best ways to keep nutrients intact. Just avoid overcooking and don’t drown your veggies in water, and you’ll get a quick, nutritious meal with minimal nutrient loss.

Of course, the right materials play a huge part as well. You need safe, non-toxic microwave steamers that won’t leach harmful chemicals into your food. Plastic is a no-no because according to multiple studies. That’s exactly why I went down this rabbit hole of finding the best non-plastic microwave steamer in 2025 that is actually safe to use.

Here’s why picking a “BPA-free microwave steamer” isn’t always enough to keep your meals safe.

The Most Toxic Microwave Steamer Materials

Most microwave steamers available in 2025 are either plastic, glass, or silicone.  When it comes to plastics and low-grade silicone, certain chemicals can pose health risks, especially when heated. 

Bisphenol A (BPA): A Hormone-Disrupting Chemical in Plastics

BPA is widely used in plastic manufacturing to make products shatter-resistant and durable. We can find it in everything from food containers to water bottles, and, unfortunately, many microwave steamers. The problem with BPA is that it doesn’t just stay in the plastic. When exposed to heat, such as in a microwave, it can leach into food and mimic estrogen in the body. This hormonal interference can cause infertility, developmental disorders, and even increased cancer risk.

A Horizon 2020 research initiative found that over 92% of European people tested had detectable levels of BPA in their bodies, likely due to food packaging exposure. The same is also true for Americans. The Endocrine Society has warned that BPA disrupts hormone function and may contribute to metabolic diseases like obesity and diabetes. Research from the Harvard School of Public Health also found that participants who drank from BPA-containing plastic bottles for just one week had a 69% increase in BPA levels in their urine—showing how easily it enters the body.

While many brands now claim to offer “BPA-free microwave steamers”, manufacturers often replace BPA with similar chemicals like BPS or BPF, which may be just as harmful. This is why opting for truly safe non-toxic microwave steamer materials, like glass or high-quality silicone, is a better choice.

Polyvinyl Chloride (PVC): A Plastic That Releases Toxic Byproducts

PVC, or polyvinyl chloride, is a type of plastic present in food packaging, plastic wraps, drawer liners, and some kitchen containers. It’s considered one of the most toxic plastics because it can release harmful chemicals like dioxins and phthalates when exposed to heat. Dioxins are highly toxic compounds that can accumulate in the body over time, leading to long-term health risks.

According to the World Health Organization (WHO), dioxin exposure can cause immune system suppression, hormone imbalances, and an increased risk of cancer. The Environmental Protection Agency (EPA) has also classified dioxins as a probable human carcinogen, meaning they may contribute to cancer development. In one study, researchers highlighted that when PVC-containing plastics were heated, they released up to 90 times more dioxins compared to when they were at room temperature.

PVC plastics are often labeled with the recycling code #3, so checking packaging labels can help you avoid them. Better yet, choose  non-toxic microwave steamers made of 

glass or silicone microwave steamers eliminate the risk altogether.

Other Harmful Additives in Low-Quality Plastic Steamers

Beyond BPA, phthalates, and PVC, many low-quality plastics contain additional additives that can be just as harmful. Some manufacturers use antimony, styrene, and other chemical stabilizers to improve durability, but these compounds can be responsible for nervous system damage, respiratory issues, and even potential carcinogenic effects.

A study published in the journal Environmental Science & Technology found that many plastic food containers—especially those made from polycarbonate and polystyrene (#6 plastics)—released measurable amounts of endocrine-disrupting chemicals when heated. The researchers noted that even some BPA-free plastics still leached chemicals that affected hormone activity.

The best way to avoid these hidden dangers? Ditch plastic microwave steamers altogether and choose one of the many non-toxic microwave steamer alternatives. Food-safe glass, stainless steel, or high-quality silicone are the safest bets. 

Non-Food Grade Silicone Streamers Are Also Toxic

Silicone can be very toxic when used in microwave steamers as lower-grade versions can contain fillers, plastic additives, or other harmful chemicals that may leach into food when heated. A 2019 study published in the journal Environmental Science & Technology found that certain silicone kitchen products released siloxanes (silicone-based chemicals) when exposed to high heat, some of which may be harmful in large amounts.

If a steamer has a strong chemical smell when heated, then you should dispose of it right away. This often indicates the presence of fillers or volatile compounds. Also, if It turns white when twisted or pinched, it’s not a good sign. High-quality, food-grade silicone steamers will remain their original color. If it turns white, it likely contains plastic fillers. 

To make sure that your Non-toxic microwave steamer is actually safe, look for options made from 100% food-grade, LFGB-certified, or platinum-cured silicone. These certifications verify that the silicone is free from harmful fillers and safe for repeated microwave use. The FDA also has food-contact standards for silicone, but LFGB certification (used in Europe) is even stricter.

If you’re unsure about a silicone steamer’s safety, glass is the safest alternative since it doesn’t leach any chemicals.

Also Read: The Best Non-Toxic Bread Makers in 2025

What Makes a Microwave Steamer Non-Toxic & Healthy?

100% Food-Grade Silicone Steamers

High-quality BPA-free microwave steamers made from 100% food-grade silicone are an excellent alternative to plastic. Unlike lower-quality silicone, which may contain plastic fillers, platinum-cured or LFGB-certified silicone is completely non-toxic and heat-resistant.

A microwave steamer basket made from high-quality silicone is flexible, lightweight, and easy to clean. It won’t absorb flavors or odors, making it a great BPA-free microwave vegetable steamer for everyday use. However, it’s crucial to avoid cheap, low-grade silicone that can break down over time. Always check for food-safe certifications.

Borosilicate Glass Microvawe Steamers

A Borosilicate glass microwave steamer is one of the safest and most durable options available. This type of glass is made with silica and boron trioxide, which gives it superior thermal resistance—meaning it won’t crack or shatter when exposed to sudden temperature changes. This makes it ideal for glass microwave steamers and cookware.

In contrast, normal (soda-lime) glass is more fragile and prone to breaking under heat stress. It’s commonly used for drinkware and household glass products, but it’s not as safe for microwave use because it can expand unevenly and shatter. 

Most importantly, a glass vegetable steamer won’t leach chemicals or absorb food odors. That’s why experts recommend this particular type of glass for most kitchen tools and gadgets including food processors and popcorn makers.  So, If you’re looking for the safest BPA-free microwave vegetable steamer, glass is an excellent choice.

Stainless Steel (for Hybrid Designs)

While stainless steel isn’t microwave-safe on its own, some non-toxic microwave steamers combine stainless steel bases with microwave-safe lids to create a safe and durable steaming experience. Stainless steel is naturally BPA-free, non-toxic, and highly resistant to rust or corrosion. A microwave steamer basket with a stainless steel insert can help distribute heat evenly while keeping food free from plastic contamination. If you prefer a non-plastic microwave steamer, hybrid designs that mix stainless steel with glass or food-grade silicone are a great option.

Ceramic Microwave Steamers

This is a tough one because ceramic products aren’t always safe. They can be, but only if they are made from high-quality, lead-free, and cadmium-free ceramic. Low-quality or older ceramic cookware, dinnerware,  and kitchen tools may be treated with highly toxic glazes, which can leach into food over time—especially when microwaved. A 2017 study by the FDA found that some imported ceramics tested positive for lead contamination, posing long-term health risks.

To choose a safe ceramic microwave steamer, you should always check for “Prop 65” compliance in the U.S. On top of that, always go for high-quality, food-safe glazes and avoid brightly colored glazes, which may contain heavy metals. Lastly, just like every other non-toxic microwave steamer in 2025, ceramic options should carry the “ Microwave-safe labeling.”  Otherwise, borosilicate glass or food-grade silicone may be a safer bet for steaming food in the microwave.

Certifications & Labels to Look For

When choosing the best non-toxic microwave steamer, always check for certifications that confirm safety and quality.

• BPA-Free and BPS-Free: Verifies the steamer is free from bisphenol-A and other harmful plastic additives.
• FDA-Approved / LFGB-Certified: FDA-approved materials meet U.S. food safety standards, while LFGB certification (used in Europe) is even stricter.
• Microwave-Safe Testing Standards: Opt for steamers tested for heat resistance and non-toxicity at high temperatures.

Also Read: Best Plastic-Free Salad Spinners

7 Best BPA-Free & Non-Toxic Microwave Steamers in 2025

1. Anyday Plastic-Free Microwave Dish Set

• Safe Materials: Frosted Borosilicate Glass, Platinum-Grade Silicone
• Features: splatter-blocking, airtight lids
• Capacity: 2 Cups, check the entire collection for more sizes

My Review: Anyday offers the best non-toxic microwave steamer lineup in 2025. This set is made from durable frosted borosilicate glass which means that these containers allow me to steam, cook, and serve without worrying about plastic leaching into my food. The platinum-grade silicone-rimmed glass lids do an excellent job of trapping steam for moist, evenly cooked meals while also preventing splatters.

Plus, they stack neatly for storage, and even double as mixing bowls and food storage containers. I’ve used them to steam veggies, reheat leftovers, and even roast a small chicken in the oven. This BPA-free microwave steamer passed every single test with ease!

Shop on Amazon – $44.99

2. Anyday Microwave Freezer Tray

• Safe Materials: LFGB food-grade platinum silicone
• Features: Freezer to microwave
• Capacity: 4 x 1/2-cups 

My Review: I rarely include two options for the same brand in my blog posts, but Anyday absolutely deserves it. This silicone freezer tray has completely streamlined my meal prep routine. The LFGB food-grade platinum silicone is not only safe and durable but also makes it easy to pop out perfectly portioned ½-cup servings of soups, sauces, and grains.

I really like that the reinforced stainless steel wire keeps it sturdy, preventing spills in my freezer. Plus, the protective silicone lid locks out unwanted odors, so my frozen food always tastes fresh. Whether I’m batch-cooking or saving leftovers, this non-plastic microwave steamer is a must-have for hassle-free, non-toxic food storage. 

Shop on Amazon – $21.99

3. LERIYUFS Glass Microwave Steamer 

• Safe Materials:  Borosilicate Glass
• Features: Doubles as a casserole dish & a shallow glass baking dish or as a Dutch oven
• Capacity: 1.1 Quarts

My Review: This is the best non-toxic microwave steamer for those of us who want one versatile product to rule them all. LERIYUFS is a glass microwave steamer, a non-toxic Dutch oven, and a baking dish all in one!  Its multifunctional design means I can bake, serve, store, and reheat all in the same dish—without worrying about harmful chemicals leaching into my food.

The glass lid doubles as a shallow baking or serving dish, which is a fantastic bonus. I especially love using it for baking sourdough bread, as it provides excellent heat retention without the hefty price tag of a Dutch oven. Easy to clean and dishwasher-safe, you can use it as a microwave vegetable steamer or as an ice, fish, and dumplings steamer.

Shop on Amazon – $19.99

4. SIMAX Glass Steamer for Microwave

• Safe Materials: Borosilicate Glass
• Features: Oven Safe, Microwave Safe, Dishwasher Safe
• Capacity: 2.5 Quart

My Review: This Simax casserole dish works as a microwave vegetable steamer, letting me cook, serve, store, and reheat without extra dishes to wash. Just like LERIYUFS, this product is made from high-quality, shock-resistant borosilicate glass that withstands temperatures between 572° and -40° Fahrenheit (300°/-40° Celsius).

So, it seamlessly transitions from oven to fridge to microwave without cracking. I love the tight-fitting lid, which keeps moisture in for slow cooking and even doubles as a small roasting or serving pan. Plus, it’s made in Europe with cadmium- and lead-free recycled glass, giving me peace of mind about food safety.  

Shop on Amazon – $29.99

5. GLOU Collapsible Silicone Microwave Steamer

• Safe Materials: Food grade BPA-free silicone, glass
• Features: Microwave safe, freezer safe and dishwasher safe, silicone mat layer, 
• Capacity: 0.8 Liters

My Review: Sadly, when it comes to the best BPA-free microwave vegetable steamers, the options are limited. Especially if you want your container to be 100% plastic-free. These collapsible glass mixing bowls/steamers make microwave cooking both healthier and more convenient. The BPA-free silicone seal keeps food fresh and odor-free, while the heat-resistant handles make it easy to move them without burning my hands.

Their space-saving design is a great choice for small kitchens, folding down neatly when not in use. Plus, they’re safe for the microwave, oven, air fryer, freezer, and dishwasher. The only downside is that the glass is not Borosilicate. Other than that, this non-plastic microwave steamer ticked all my boxes.

Shop on Amazon – $29.99

6. Bakerpan Microwave Vegetable Steamer

• Safe Materials: Food-grade silicone
• Features: Safe for Use in Microwave, Air Fryer and Dishwasher
• Capacity: 1.9 Liters

My Review: This food-grade silicone steaming pot is a fantastic non-toxic alternative for quick and easy steaming. It’s much larger than GLOU and perfect for big families.  I really like its collapsible design, which makes storage effortless, especially in smaller kitchens. It’s incredibly versatile—perfect for steaming vegetables, seafood, and dumplings without needing an extra insert.

The heat-resistant, non-stick surface makes cleanup a breeze, and since it’s microwave, air fryer, and dishwasher-safe, it fits seamlessly into my daily cooking routine. If you want a safe, durable, and convenient steaming solution, this pot is definitely worth considering.

Shop on Amazon – $25.99

7. Xtrema Ceramic Microwave Steamer

• Safe Materials: Pure ceramic
• Features: California Prop 65 compliant, Microwave, oven, BBQ, freezer, and dishwasher safe, tested and certified PFOA free and PTFE free
• Capacity: 1.1qt (more sizes available)

My Review: Xtrema is one of my favorite non-toxic cookware brands! This is the only 100% pure ceramic pan and microwave steamer I use on a weekly basis as it offers even heating and excellent thermal retention. The skillet is certified free of harmful chemicals, including PFOA, PTFE, lead, and cadmium.

Much like most of their pans, this one is triple fired and ultra-purified at 2,500 degrees and completely free of glues, polymers, dyes, or coatings
Its versatility is also unmatched—it moves effortlessly from the microwave to the oven, grill, and even the campfire. And to top it all off, it’s scratch-resistant, stain-proof, and dishwasher-safe, making cleanup a breeze.

Shop on Amazon – $113.94

Popular BPA-Free Microwave Steamers I Don’t Recommend 

Sistema Microwave Steamer – Judging by the 35.000 glowing Amazon reviews, Sistema does the job. However, the fact that it is 100% virgin plastic (Phthalate- and BPA-free) doesn’t mean that it is also BPS-free. In my opinion, it creates too much unnecessary waste.

Progressive International Mini Microwave Steamer – A reader emailed us about this BPA-free microwave vegetable steamer last week asking our opinion. It’s surely very popular on Amazon and pretty affordable but, again, the steamer is entirely made of “ high-heat polypropylene. It might be BPA-free but not bps-free.

How to Choose the Right Non-Toxic Microwave Steamer free of BPA for You

Single-Use vs. Multi-Use Steamers

Not all steamers are right for every task. Some are designed only for veggies, while others can handle rice, fish, dumplings, and more. If you want the best microwave vegetable steamer, a microwave steamer basket with multiple tiers might be ideal for cooking different foods at once. If you’re all about convenience, a multi-use non-toxic microwave steamer will give you the most bang for your buck.

Size & Capacity 

Size matters—especially when it comes to steaming. If you’re steaming veggies for one, a compact BPA-free microwave steamer is a great choice. But if you’re feeding a family, look for a larger glass vegetable steamer or a multi-tiered microwave steamer basket that can handle bigger portions. Make sure it fits in your microwave, too—no one likes a steamer that’s too big to rotate!

Portability 

Want to steam veggies at work or on vacation? A non-plastic microwave steamer that’s lightweight and durable is your best bet. Food-grade silicone steamers are flexible and easy to pack, making them ideal for travel. If you prefer a glass microwave steamer, make sure it comes with a secure, microwave-safe lid to prevent spills on the go.

Material Preferences: Silicone vs. Glass vs. Hybrid

Each material has pros and cons. Borosilicate glass steamers are durable, non-toxic, and won’t absorb odors, but they’re heavier. 100% food-grade silicone steamers are lightweight, flexible, and shatterproof, but you need to ensure they’re LFGB-certified for safety. Hybrid options, like stainless steel bases with silicone or glass lids, offer durability with added convenience.

If you’re looking for the best non-toxic microwave steamer, glass, and high-quality silicone are the safest choices.

Ease of Cleaning & Maintenance

If scrubbing dishes isn’t your thing (same here!), go for a dishwasher-safe microwave steamer. Glass microwave steamers and BPA-free microwave vegetable steamers with smooth surfaces are easier to clean. Silicone is also naturally non-stick, but lower-quality versions can trap odors. The easier it is to clean, the more you’ll actually use it!

Lid Venting System & Safety Features

Ever had a steamer lid pop off mid-cook? Not fun. A good venting system prevents pressure buildup and ensures even steaming. Look for microwave steamers with adjustable vents so you can control the steam flow. Stay-cool handles and spill-proof lids are also great features for safety. If you’re going with a glass steamer for the microwave, make sure it has a sturdy, heat-resistant lid.

Also Read: Best Teflon-Free Panini Presses

Tips for Microwave Steaming for Best Results

How to Properly Use a Non-Plastic Microwave Steamer

Using a non-toxic microwave steamer is simple, but a few tricks can make a big difference:

1. Add the Right Amount of Water – Most microwave steamer baskets require a small amount of water (usually 2–4 tablespoons). Too much water can lead to boiling instead of steaming.
2. Use the Lid’s Venting System – If your glass microwave steamer or BPA-free microwave vegetable steamer has an adjustable vent, keep it slightly open to release excess steam.
3. Cut Food Evenly – Chop vegetables into uniform sizes to ensure even cooking.
4. Layer Smartly – Place denser foods (like carrots or potatoes) on the bottom and delicate foods (like leafy greens) on top.
5. Adjust Cooking Times – Start with the lowest time recommendation and check for doneness. Overcooking can lead to mushy textures and nutrient loss.

What Can You Steam In A Microwave?

Not sure what to steam? Here are some of the best foods for microwave steaming and how to cook them:

• Vegetables: Broccoli, carrots, asparagus, zucchini, bell peppers, spinach, and green beans. (Most cook in 2–5 minutes.)
• Rice & Grains: White rice, brown rice, quinoa, and couscous. (Use a rice-specific microwave steamer and follow water ratio instructions.)
• Fish & Seafood: Salmon, tilapia, shrimp, and shellfish. (Steam with seasonings or a splash of lemon juice for extra flavor.)
• Dumplings & Bao: Frozen or fresh dumplings, gyoza, or bao buns. (Place them on parchment paper or a steaming tray to prevent sticking.)

If you’re using a glass vegetable steamer or a ceramic microwave steamer, always check food safety labels to ensure proper usage for different food types.

How to Avoid Overcooking & Retain Nutrients

One of the biggest mistakes people make with microwave steaming is overcooking food—which can ruin both texture and nutrition. Here’s how to avoid it:

• Steam in Short Intervals – Start with 1–2 minutes, then check for doneness. Add more time as needed.
• Use Minimal Water – More water means more nutrient loss. Keep it to a few tablespoons.
• Don’t Overcrowd the Steamer – Steam needs space to circulate, so don’t pack in too much food.
• Shock Veggies After Steaming – For extra crispness, rinse steamed veggies under cold water immediately after cooking to stop the cooking process.

Using Minimal Water for Maximum Steam Efficiency

The key to efficient microwave steaming is using just enough water to create steam, but not so much that food gets soggy.

• For a microwave steamer basket: Use 2–4 tablespoons of water at the bottom.
• For a glass microwave steamer or ceramic microwave steamer: Follow the manufacturer’s instructions, but usually ¼ cup of water is enough.
• For rice or grains: Water measurements vary, but using a microwave rice steamer helps prevent sogginess and ensures even cooking.

Whether you’re using a BPA-free microwave vegetable steamer, a glass steamer for the microwave, or a non-plastic microwave steamer, following these simple tips will help you get perfect results every time. 

How To Clean & Maintain Your Non-Plastic Microwave Steamer 

Always Clean Your Steamer Immediately After Use

The best way to avoid buildup and stains is to clean your steamer right after each use. After steaming, remove the food and rinse it while it’s still warm. This prevents food particles from sticking to the surface, making cleaning a breeze. For stubborn residue, fill the non-toxic microwave steamer with warm water and a drop of non-toxic dish soap. Let it sit for a few minutes to loosen food particles.

Use Non-Abrasive Cleaning Tools

Whether you’re using a BPA-free microwave vegetable steamer or a ceramic microwave steamer, avoid harsh scrubbing pads that can scratch or damage the surface. Stick to a soft sponge or cloth. For glass microwave steamers, a non-abrasive dishcloth is perfect for keeping the glass clear. A baking soda paste (mixing baking soda and water) can help remove hard stains without scratching the surface. Simply apply and let it sit for 10–15 minutes, then rinse off.

Dishwasher-Safe? Check First!

Many food-grade silicone steamers and glass microwave steamers are dishwasher safe, but always check the product’s label first. Some ceramic microwave steamers or hybrid designs may need hand washing. If you’re not sure, it’s safer to clean by hand to preserve the material and any special coatings.

Keep Silicone Steamer Flexible & Odor-Free

If you’re using a 100% food-grade silicone steamer, keep it flexible by avoiding high-heat drying or exposure to harsh chemicals. To remove lingering odors, soak the silicone steamer in a mixture of baking soda and water for a few hours. You can also add a few.  

Deep Clean for Stubborn Residue

For glass microwave steamers and ceramic microwave steamers, you might need to deep clean occasionally to remove any buildup or hard-water stains. Try soaking in a vinegar-water solution for 30 minutes, then scrub gently with a soft sponge. This will help break down mineral deposits and keep your steamer shining.

Store Properly  

When not in use, store your non-plastic microwave steamer in a cool, dry place. For glass vegetable steamers, make sure they are placed away from high-traffic areas where they could get knocked over. For silicone steamers, fold them neatly or keep them flat to maintain their shape. If you have a microwave steamer basket with multiple parts, store them stacked neatly to avoid warping or accidental damage.

Check for Wear & Tear

Over time, your best non-toxic microwave steamer might show signs of wear. Look out for cracks, warping, or discoloration. If your steamer shows signs of damage, especially silicone or glass, it may be time to replace it to avoid food contamination or spills. Glass microwave steamers can last a long time if handled with care, but silicone steamers need to be checked for tears or thinning. Be proactive about replacing damaged steamers for your health and safety. 

FAQs About Non-Toxic Microwave Steamers Free of BPA

More Plastic-Free Kitchen Tools I’ve Reviewed:

• Vegetable Peelers
• Garlic Presses
• Colanders
• Mixing Bowls
• Ice Cube Trays
• Utensils
• Aluminum Foil Alternatives
• Graters
• Cutting Boards
• Measuring Cups
• Crepe Pans
• Sauce Pans
• Dutch Ovens
• Loaf Pans
• Griddles
• Coffee Grinders
• Juicers
• Non-Toxic Egg Cookers 

Final Thoughts on the Best Non-Toxic Microwave Steamers Free of BPA 

These were the best non-toxic microwave steamers in 2025 according to my tests! If you’re like me, you love the convenience of a microwave steamer—quick, easy, and a great way to keep nutrients locked into your food. But what I didn’t love? The idea is that toxic chemicals like BPA and phthalates could be sneaking into my meals. Many microwave steamers are made from low-quality plastics that contain harmful substances. Bisphenol A (BPA),  Phthalates, and PVC are only a few examples that release toxic fumes when exposed to heat. These chemicals don’t remain confined to the plastic. That’s why I only recommend BPA-free microwave steamers. 

The safest choices for microwave steamers are BPA-free plastics, particularly food-grade polypropylene (#5 plastic). Silicone is also an excellent option—high-quality, food-grade platinum silicone is flexible, durable, and free of harmful substances. Glass stands out as the safest and most inert material for non-plastic microwave steamers, although it can be heavier and less frequently used in steamers.

Konstantina Antoniadou, Chemicals & Health Expert

Senior Writer, Product Researcher & Tester

Konstantina Antoniadou is an expert sustainability writer, certified in Chemicals and Health by Johns Hopkins University, where she focused on the toxicity of commonly found household chemicals and their health impacts. She has also completed specialized studies in Sustainable Fashion (Copenhagen Business School), Business Models for Sustainability (BMS), and Sustainable Development Goals (University of Copenhagen), deepening her expertise in the connection between personal choices and global environmental change. With years of experience as a senior writer and researcher, Konstantina now leads our reviews of non-toxic home products, beauty and skincare brands, and sustainable fashion. K. is also the creator of the popular 7-Day Non-Toxic Living Challenge, downloaded over 2,000 times and praised for its accessible, science-backed tips.