Are Plastic Food Containers Safe to Reuse?

Q. Dear EarthTalk: I've read that plastic bottles are not always safe to reuse over and over as harmful chemicals can leach out into the contents. I'm wondering if the same issues plague Tupperware and other similar plastic food storage containers.

— Sylvie, Dawson City, Yukon, Canada

A. The recent hubbub over plastic containers leaching chemicals into food and drinks has cast a pall over all kinds of plastics that come into contact with what we ingest, whether deserved or not. Some conscientious consumers are forsaking all plastics entirely out of health concerns. But while it is true that exposure to certain chemicals found in some plastics has been linked to various human health problems (especially certain types of cancer and reproductive disorders), only a small percentage of plastics contain them.

According to The Green Guide , a website and magazine devoted to greener living and owned by the National Geographic Society, the safest plastics for repeated use in storing food are made from high-density polyethylene (HDPE, or plastic #2), low-density polyethylene (LDPE, or plastic #4) and polypropylene (PP, or plastic #5). Most Tupperware products are made of LDPE or PP, and as such are considered safe for repeated use storing food items and cycling through the dishwasher. Most food storage products from Glad, Hefty, Ziploc and Saran also pass The Green Guide's muster for health safety.

But consumers should be aware of more than just a few “safe” brands, as most companies make several product lines featuring different types of plastics. While the vast majority of Tupperware products are considered safe, for example, some of its food storage containers use polycarbonate (plastic #7), which has been shown to leach the harmful hormone-disrupting chemical Bisphenol A (BPA) into food items after repeated uses. Consumers concerned about such risks might want to avoid the following polycarbonate-based Tupperware products: the Rock ‘N Serve microwave line, the Meals-in-Minutes Microsteamer, the “Elegant” Serving Line, the TupperCare baby bottle, the Pizza Keep' N Heat container, and the Table Collection (the last three are no longer made but might still be kicking around your kitchen).

Beyond BPA, other chemicals can be found in various food storage containers. Containers made out of polyethylene terephthalate (PET or PETE, or plastic #1)—such as most soda bottles — are OK to use once, but can leach carcinogenic, hormone-disrupting phthalates when used over and over again. Also, many deli items come wrapped in plastic made from polyvinyl chloride (PVC, or plastic #3), which can leach cancer-causing dioxins. Swapping foods out of such wraps once the groceries are at home is advisable.

Containers made of polystyrene (PS, or plastic #6, also known as Styrofoam) can also be dangerous, as its base component, styrene, has been associated with skin, eye and respiratory irritation, depression, fatigue, compromised kidney function, and central nervous system damage. Take-out restaurant orders often come in polystyrene containers, which also should be emptied into safer containers once you get them home.

If your head is spinning and you can't bear to examine the bottom of yet another plastic food storage container for its recycling number, go with glass. Pyrex, for instance, does not contain chemicals that can leach into food. Of course, such items can break into glass shards if dropped. But most consumers would gladly trade the risk of chemical contamination for the risk of breakage any day.


The Green Guide


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green_eyed_girl's picture
User offline. Last seen 6 years 39 weeks ago. Offline
Joined: 10/21/2009

Most consumers would rather risk being exposed to chemicals than dealing with a broken Pyrex container? Are they kidding? The likelihood of you dropping a glass dish is small, very very small. (I know friends of mine that have inherited their moms' Pyrex measuring cups and baking dishes and will likely have them till the day they die!) I'd rather deal with the very remote possibility that I'll have to spend seven minutes sweeping up broken glass than to know that every time I re-use, or even just use, plastic that I am getting exposed to those chemicals which could be hurting my long-term health.

Soledad's picture
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Joined: 07/19/2012

How long did it take you to type your rant because if you would have simply slowed down and reread the sentence that got you up in such a tizzy you might have saved quite a bit of time.

"But most consumers would gladly trade the risk of chemical contamination for the risk of breakage any day."

Trade the risk of chemical contamination which means you lose that risk and take on the risk of breakage. Of course this could have been edited after your post but seriously if you read the tone of the blog it is pretty apparent what they meant to say. And it seems pretty silly that you need to work up such a fervor to explain a concept as simple as the fact that breaking glass is no big deal.

jcdcameron's picture
User offline. Last seen 3 years 5 weeks ago. Offline
Joined: 06/13/2013

A lot of plastic containers contains strong chemicals that is not good for our body. Using these plastic containers should be avoided and if not using it ones is enough and should be thrown in the garbage can or use it in other purposes but not on food. There are a lot of trusted brands of plastic storage containers that offers reusable and safe for storing food.

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john lee
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User offline. Last seen 1 year 37 weeks ago. Offline
Joined: 04/29/2014

Clients and consumers always looks on how fresh is the product. Some companies ( ) offer impressive storage ways to retain food in its freshness.

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