The Camelbak Forge Flow Vacuum Mug 0.35L is made with double-walled, vacuum-insulated steel designed to keep your drink hot for up to 5 hours and cold for 10 hours.This rugged and sound travel mug has been redesigned with easy-sip features that make this vessel a must-have co-pilot for beverages on the go. Equipped with one hand drink lever operation and a convenient free-flow lock open for frequent sips. Finished with a non-slip silicone base and a full powder coat finish for added durability.Camelbak Forge Flow Vacuum Mug 0.35L FeaturesLeak-proof when closedLocks open for easy cooling and frequent sippingSelf-sealing one-handed drink leverNon-slip silicone baseVacuum insulated 18/8 stainless steelDurable powder coat finishDishwasher safe arm flips up for easy cleaning, cap and vessel dishwasher safeDrink clean BPA, BPS & BPF freeTea infuser accessory compatible: Sold Separately.