Plastic may be versatile, lightweight and cheap, but some types of plastic also leach chemicals into foods. If you're keeping some plastic around, purge anything marked with a recycling code No. 3 or 7 first. Those numbers are used to mark hard plastics that often have the hormone-disrupting chemical bisphenol-A. Whatever you use for food storage, avoid microwaving or cooking in plastic, and avoid using plastics that show signs of age, since these conditions make chemical leaching more likely.
Related: What do Recycling Codes on Plastics Mean?
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