CupsCo Mustache Cup 16oz 4-pack Stainless Steel 100% Type 304, 18/8 Food-Grade Stainless Steel BPA-free, Phthalate-free, Lead-free (3rd Party Tested) 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.