CupsCo Classic Cup 16oz 4-pack Stainless Steel 100% Type 304, 18/8 Food-Grade Stainless Steel, BPA-free, Phthalate-free, Lead-free (3rd Party Tested)....Now with a beautiful hand-polished Mirror Interior Dishwasher Safe, Stackable and Packable Shatterproof - goes where glass cant, Lifetime Durability UPcyclable - should tragedy strike and your cup is run over by a steamroller, it can be converted into material of equal or higher quality. Responsibly packaged - designed to use the minimum amount of material that will fulfill the functional requirement (holding 4 cups together) and is made from 100% recovered (recycled) materials.