Sized for mobility.With all the strength and function of its bigger brothers, this half-quart bottle packs easier than larger vacuum bottles when space is a premium. Fully leak proof, it"ll keep your drink warm and your pack dry.Compact design. Stashes easily in pack. Vacuum insulation. Keeps hot/cold 15 hours. Protective double-wall construction. Takes a beating and still performs. Insulated lid. Doubles as an 8-oz. drinking cup. Leak-proof stopper. Locks it in. Turns + pours from front/back. Stainless steel. Built tough. No liners/coatings. Rustproof finish. Withstands weather and wear.