Tupperware products are offered for sale at a retail store on April 10, 2023 in Chicago. Tupperware stock closed down nearly 50 percent today after the company warned that it may go out of business.Since Tupperware, the iconic kitchen brand that’s been a household name for decades, signaled recently that it might be, you might be wondering how long your stash of its food storage containers is safe to use — especially if it’s vintage.
In addition to food containers, BPA has been used in various other products, such as shatterproof windows, water bottles and eyewear, and in resins coating metal food cans, bottle tops and water supply pipes. The composition of your plastic product can depend on the year you bought it, Vandenburg said.CNN has contacted Tupperware for comment but has not received a response.
Putting highly acidic foods — such as tomatoes or citrus fruits — in these products does the same thing, Vandenburg said. 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. “And now there’s an interaction with the food and the plastic . So if the plastic is discolored, it’s telling you that that plastic is breaking down.”
The shape of the molecules in BPA make it more likely to bind to estrogen receptors, Vandenburg added. “I avoid using those reusable plastics as much as possible, because I have yet to see good evidence that there are consumer plastics that are free from estrogenic properties.”
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