The versatile and imposing OtterBox Growler, available in a black or stainless steel finish, is a 64oz. tumbler that can take plenty of rough and, er, tumble. Forged with a lining of copper to ensure a constant temp--cool or warm--it also features a leak-proof, screw-on lid and sweat-resistant design to meaning no rings, while the generous capacity means you can share your fluid freely.