This large Camelbak double wall, vacuum insulated stainless steel tumbler has a capacity of 500ml and keeps drinks cold for six hours or hot for up to four hours. It has a tough powder coated finish and a non-slip silicone base that provides a soft landing on surfaces to avoid scratches and spills. It has a smart push on lid with a secure silicone seal and a spill-resistant Tri-mode sliding closure that controls the beverage flow when open.