The double-wall vacuum-insulated walls give you a worry-free mind knowing your 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 for those hot sunny days while keeping the heat within the inner wall so you don't have to worry about burning your hand on your favorite hot beverage. Ideal to use as your everyday coffee cup or enjoying a cold one on a hot summer day. The 16oz tumbler is designed to fit comfortably in your hand and most car cup holders. The vacuum-insulated walls ensure when you fill it with your favorite piping hot morning coffee it will last until your next refill. Along with the double-wall technology which prevents sweating on the outside of the bottle, so you don't have to worry about water rings on your table when enjoying your favorite cold brew at the end of the night.