The leak-proof* stainless carry tumbler has a flip lid with safety lock that prevents the lid from opening accidentally. The lid is one-piece and gasket-free, and the stainless steel interior is slicksteel® polished. Its vacuum insulation will keep drinks hot or cold, while keeping the exterior from getting hot, or minimizing condensation. A perfect companion for business meetings or studying! - stainless steel vacuum insulated construction with superior heat and cold retention - leak-proof*, gasket-free, one-piece lid is easy to clean and prevents the loss of parts (*when used properly according to the instruction manual) - flip lid with safety lock (clip-type) prevents the lid from opening accidentally - lid is designed to minimize condensation from forming - slicksteel® polished stainless steel interior minimizes odors and stains - bpa-free (all surfaces that come into contact with food or beverage) and 18/8 stainless steel