Keep it Green and clean! It is Unbreakable. Easy to wash by-hand or in the dishwasher. 4 PCS.PERFECT FOR KIDS -This 10 oz tumbler set is IDEAL for the health conscious family. This is made with the Highest Quality Premium 304 18/8 Food Grade Stainless Steel.Free from BPA, phthalates, Lead,, and all other toxins.