While most plastic containers are made out of easily recyclable material, the majority of their caps and lids are not. "Plastic bottle caps can really gum up the works at the recycling plant," says Whole Living eco-expert Mindy Pennybacker. They're typically number 5 plastic, which has a much higher melting point than the bottles, which are mostly number 1. If you don't want to throw out the tops, Pennybacker suggests mailing them to the ReCap Company in Ohio.
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