ELI5: Explain Like I'm 5

Polyethylene terephthalate

Polyethylene terephthalate (PET) is a type of plastic. It is very strong and lightweight. It can also be melted down and reused. PET is used to make food and drink containers, and also to make clothing, toys, and other products. It is safe to use because it does not easily break down and release harmful chemicals.