Lori Bongiorno

Safest plastics for food and beverages

Some plastics are safer to eat and drink from than others. Here's a quick guide to help you make informed choices. If you want to dig deeper, take a look at the Institute for Agriculture and Trade Policy's Smart Plastics Guide (PDF). 

It's worth avoiding the following plastics when you can. You can identify a plastic by looking at the recycling code number that appears inside a triangle at the bottom of many containers.

Resin code #3

Polyvinyl chloride (PVC) can leach phthalates, known male reproductive toxicants. It can be identified by code 3. One way to avoid it in the kitchen is by choosing plastic wrap made from polyethylene rather than PVC. If a box is not labeled, find a brand that is or call the manufacturer.

Resin code #6

Polystyrene is used in Styrofoam products. It may leach styrene (a neurotoxin) when it comes into contact with hot, acidic, or fatty foods. It's marked with recycling code 6.

Resin code #7

Polycarbonate can leach bisphenol-A (BPA), an endocrine disruptor associated with a long list of health concerns. Baby bottles, "sippy" cups, 5-gallon water jugs, and reusable beverage bottles are typically made out of this plastic. Products may be marked with recycling code 7 and/or the letters "PC." It’s important to note that some containers that aren’t made from polycarbonate may also be marked with a code 7 because the category also includes any plastic that doesn’t fit into the 1 to 6 recycling code categories.

In response to the widespread concerns about BPA, baby bottles and other items made from alternative materials are springing up. Experts say stainless steel is your best bet for reusable water bottles right now. ThinkSport and Klean Kanteen are two widely available brands.

The following plastics are considered safest for food storage. Glass and stainless steel are also good options.

Resin code #1

Polyethylene terephthalate ethylene (PETE), code 1.

 

Resin code #2

High-density polyethylene (HDPE), code 2.

 

Resin code #4

Low-density polyethylene (LDPE), code 4.

 

Resin code #5

Polypropylene (PP), code 5.



Here are some tips for using all plastics safely:

  • Don't microwave food in plastic containers. Chemicals are more likely to leach out when plastic is heated. "Microwaveable plastic" doesn't guarantee that chemicals won't leach. Cover foods in the microwave with wax paper or a plate. If you do use plastic wrap, then make sure it doesn't touch the food.
  • Avoid putting hot foods in plastic containers. Let leftovers cool off before storing them in plastic.
  • Take good care of plastics by not washing them with harsh chemicals, and dispose of scratched and worn containers. Research has shown that older, scratched items will leach more, says Kathleen Schuler at the Institute for Agricultural and Trade Policy. (Don't put them in the dishwasher if you want to be completely risk-averse, she suggests.)
Environmental journalist Lori Bongiorno shares green-living tips and product reviews with Yahoo! Green's users. Send Lori a question or suggestion for potential use in a future column. Her book, Green Greener Greenest: A Practical Guide to Making Eco-smart Choices a Part of Your Life is available on Yahoo! Shopping.
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comments from our community

Showing 1 - 15 of 147 comments

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  • Posted by tlove1953 Mon Nov 10, 2008 3:23am PST
    quit making it
    Report Abuse
  • Posted by Boboy Mon Nov 10, 2008 3:25am PST
    nice one....thanks
    Report Abuse
  • Posted by salarzai_n Mon Nov 10, 2008 3:25am PST
    Thanks, Please continue,
    Report Abuse
  • Posted by shabideent Mon Nov 10, 2008 3:26am PST
    Thanks for your research into safer products.I am interested in your containers and you will soon hear from me.
    Report Abuse
  • Posted by paulettepk Mon Nov 10, 2008 3:27am PST
    something else to think about
    Report Abuse
  • Posted by Pat N Mon Nov 10, 2008 3:31am PST
    No more bottled water. Now I use a water filter on my kitchen fauset, I feel much better about my drinking water and I don't have plastic bottles to throw away.
    Report Abuse
  • Posted by Jules Mon Nov 10, 2008 3:36am PST
    It's really frustrating that nothing seems safe anymore. These toxic containers should be taken off the market.
    Report Abuse
  • Posted by sam Mon Nov 10, 2008 3:38am PST
    are you sure this doesnt come from china?
    Report Abuse
  • Posted by ndodge3 Mon Nov 10, 2008 3:38am PST
    just another side effect of our "throw away society" whats wrong with glass and ceramic?
    Report Abuse
  • Posted by harleydude0608 Mon Nov 10, 2008 3:41am PST
    BUY GLASS
    Report Abuse
  • Posted by Clint Mon Nov 10, 2008 3:42am PST
    Makes you wonder about the good old days, where everything was stored in glass/ceramic containers. Then there was the plastic/tubberwear boom. Then all our problems started many health concerns became prevalent like: Autism and such. All these health concerns the gov. can't find cures or help for....
    Report Abuse
  • Posted by will w Mon Nov 10, 2008 3:45am PST
    This is very useful information for us. Being conscious on an extremely limited income efficiency and reuse are our biggest choices we are able to make. We do the local farmer's market and recycle but most green products are slightly out of our price range as we barely can afford enough food as it is. Anyway we do alot of repair and reuse, like our television came from the dumpster, just needed a little fixing. Most of our kitchen storage is reused plastic and for some time now I have been concerned with this very issue. Not long ago there was an article here on Yahoo Green breaking down the various plastics which was useful, but I found this one more helpful as it outlined which are considered safest as although the other article gave a breakdown of each weighing the pro's and con's was a bit bewildering. This will make it much easier to do a kitchen sweep with a list of acceptables. There is one issue with the article though. It is useful to have a link to buying stainless steel waterbottles (which are somewhat pricey) but here where we live thanks to the local airforce base there are PCE and TCE groundwater contamination issues that are locally assured safe. My worklife brings me in contact with information about the plume that gives me doubts about this assurance. Anyway, although our water is tap we let it volatilize for a while before drinking, that is we store it in a clean container in the fridge. At present this is just an oversized plastic jug from the store with a rubber seal. Sure would be nice to have a stainless steel option for bulk water storage of a few or five gallons, and for us the investment would be well worth it long term.
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  • Posted by gpolanch Mon Nov 10, 2008 3:49am PST
    I'm concerned about these new eco-bottles with 30% less plastic. When I open the bottle, there is a strong smell of plastic.
    Report Abuse
  • Posted by Linda P Mon Nov 10, 2008 3:49am PST
    Thank you for your article. Safer choices are important. www.LindaPastor.com
    Report Abuse
  • Posted by pink_opal_15 Mon Nov 10, 2008 3:53am PST
    Wow, people are acting like the info in this story story is new or something. They've known about this stuff for years.
    Report Abuse

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