\nThe double-walled insulation keeps drinks hot for 12 hours or cold for 24 hours. \nWith the accessory closures, the bottles can be adapted to different purposes. \nSpecially shaped sports cap for comfortable drinking. \nDishwasher safe for effortless and hygienic cleaning. \nHinged Screw Cap - Can't fall off or get lost. \nRobust design for long service life. \nBPA free.