Each Hydro Flask is cast from double wall vacuum insulated food grade 18/8 stainless steel. Vacuum flask will keep contents cold for 24 hours or hot for 12 hours. Vacuum design also prevents scorched hands from hot drinks and condensation from cold drinks.
18/8 stainless steel is inherently naturally resistant to odors and bacteria. Ice cubes from standard refrigerator/freezer door ice dispensers fit perfectly through the narrow mouth. Loop top for easy clipping.