Featuring an opaque finish and a durable stone-like texture for added grip our Stone Collection emulates the most coveted semi-precious gems. The muted color palette celebrates the raw delicacy of the minerals. S'well bottles feature Therma-S’well(R) Technology with triple-layered, vacuum-insulated construction designed to keep beverages colder or hotter, longer than all the rest. Stainless steel. 25 oz. Hand-wash only.