Vacuum Insulation Water Bottle with Straw Cap. The double-wall vacuum-insulated walls give you a worry-free mind knowing your favorite beverages are kept icy cold or piping hot for hours. Made of lightweight 18/8 food-grade stainless steel that is non-leaching and will not retain taste or odor. The double-wall technology prevents condensation on the outside on those hot sunny days while keeping the heat within the inner wall so you don’t have to worry about burning your hand.. The 21 oz bottle is the optimal size to use as your everyday water bottle and is designed to fit in your backpack and most car cup holders with its narrow bottle design. The vacuum-insulated walls ensure when you fill it with your ice-cold water in the morning it will last until your next refill. The double-wall technology prevents sweating on the outside of the bottle, so you don’t have to worry about it slipping out of your hand on your afternoon run.. The 21 oz bottle includes a standard mouth leak-proof straw cap. The silicone ring ensures a snug fit to the top of the bottle to retain your beverages’ optimal temperature and is easily removable for proper cleaning. The lid is made to screw off and on your bottle easily.. Features A great way to reduce your carbon footprint and keep you going no matter the adventure; 18/8 Food Grade Stainless Steel; Double-Wall Vacuum-Insulated; Narrow Mouth Sports Cap Lid Included; Hand Wash Only; Specifications Color: Gray; Capacity: 21 oz; Material: Stainless Steel; Height: 9.8″; Diameter: 2.9″; Weight: 5 lbs; .