How long you can use your vintage Tupperware and other plastic food storage products | CNN

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How long you can use your vintage Tupperware and other plastic food storage products | CNN
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Since Tupperware signaled recently that it might be going out of business, you might be wondering how long your stash will be OK to use. The answer for any type of reusable plastic food storage product often comes down to understanding what it's made of.

Since Tupperware, the iconic kitchen brand that’s been a household name for decades, signaled recently that it might be going out of business, you might be wondering how long your stash of its food storage containers is safe to use — especially if it’s vintage. Figuring out the answer to that question for any type of reusable plastic food storage products — not just Tupperware — often comes down to understanding what they’re made of.

“Some of the plasticizers and chemicals can transfer from the plastic containers into the food during heating,” Rogers said. “So we totally advocate that you transfer your food from a plastic container into a glass bowl and microwave it that way.” Discoloration of a container can signal that a chemical change has occurred in the plastic, Vandenburg said. “Usually that is happening because there’s lots of little micro-holes or micro-tears,” she explained.

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