CupsCo Chalkboard Cup 16oz 4-pack Stainless Steel The perfect party cup! Personalize your cup and never lose your drink again. Great for weddings, parties, backyard barbecues.. you name it! And, it even comes with a stick of chalk! 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 can't, 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.