Inspired by the feathered and furry friends of the North: Polar Bear, Baby Seal, Snowy Owl, Arctic Hare, Fox, Wolf, and a Reindeer. Thermo 3D®double wall vacuum insulation keeps your beverage at the ideal temperature and18/8 medical grade stainless steel won’t transfer flavor or leave a metallic aftertaste. Sip lid is BPA free and designed to retain temperature longer and prevent splashing.