Light and compact "SLiT" design to keep beverages hot or cold for hours. Easy-to-clean nonstick interior. Whole body washable (Do not leave in water). Leak-proof*, gasket-free, one-piece lid is easy to clean and prevents the loss of parts. 4cm wide mouth opening accommodates full size ice cubes and is easy to fill. Rounded bottle opening is smooth and comfortable to the touch. Nonstick coated interior enhances durability and provides greater protection of the stainless stell against salt containing beverages like sports drinks.