Polypropylene, recycling number 5, is an FDA-approved food contact plastic that's generally used for single-serve items like yogurt cups, cream cheese containers, and syrup packets. Because of its high melting point, it can withstand the extreme temperatures of the microwave and dishwasher.

To make a long story short: plastic recycling numbers 2, 4 and 5 are the safest. Whereas plastic numbers 1, 3, 6 and 7 must be avoided. But it does not indicate that you can fearlessly use safer plastic. All plastic products can leach toxic chemicals when heated or damaged.

Steer clear of polycarbonate (PC #7) to avoid bisphenol-A (BPA). Polycarbonate is a clear hard plastic used in some reusable water bottles, baby bottles, commercial water jugs, and kitchen appliances like automatic coffee makers and food processors. Instead, choose glass or unlined stainless steel for drink containers.

Yes, PP 5 plastic (polypropylene) is generally considered safe for reuse. It is one of the safer plastics that can be reused whenever possible [2].