Malleable non-toxic lids, easy for little fingers to use;Free of BPA, phthalates, PVC and lead;All three sizes are the perfect lunch packing solution, and when done containers nest inside one another;Containers are made of unlined 18/8 food-grade stainless steel; lids are made of recyclable non-toxic LDPE number 4 plastic;Large container 16-ounce, medium container 8-ounce, small container 5-ounce