DC Comics' Caped Crusader always approves of durability and function, so he fully endorses the Batman Symbol Semi-Clear Acrylic Cold Cup! Double walled and 18 ounces, this fast-food style 'sippy' cup will not sweat or perspire...much like Batman! I think Batman uses professional grade deoderant and not thermodynamics though but the idea is still the same. Okay; not really...two different kinds of sweating here but it is Monday morning so please forgive me! The Batman Symbol Semi-Clear Acrylic Cold Cup displays the 'regular' black and yellow Batman symbol, comes with a straw and stopper so you won't lose it, and is BPA free! I think BPA is some kind of Joker Venom...or something. HAND WASH ONLY!