OXO Good Grips 30 Piece Smart Seal Glass & Plastic Container Set Set includes four round glass containers with lids, four rectangular glass containers with lids, and seven plastic containers with lids Four locking tabs secure the foolproof, leakproof lids Lids are interchangeable between the same size glass and plastic Smart Seal containers Removable silicone seal is easy to clean BPA-free plastic containers nest and stack for convenient and compact storage Plastic containers are microwave, freezer, and dishwasher safe Durable borosilicate glass containers designed to go from freezer to oven Smart Seal glass containers nest and stack for convenient and compact storage Borosilicate glass is naturally BPA free and stainproof