Recycled plastic with a purpose. Preserve's Square Food Storage Containers are made from 100% Recycled #5 plastic from single-use plastic containers like yogurt cups, and are 100% Recyclable through Preserve's Gimme 5 take-back program at the end of their life. Great for leftovers, takeout, snacks, and meal prep, these Reusable food storage containers help you reduce the amount of plastic packaging you bring into your home. Containers feature a snap-on, seal tight lid, with nesting abilities for easy storage. Dishwasher and microwave safe.