Our double-wall vacuum-insulated tumbler keeps beverages cold for up to 24 hours and hot for up to 12 hours. The TempShield technology prevents condensation and heat transfer to the outside. This tumbler features a splash-resistant design and is constructed from durable, high-quality 18/8 stainless steel. The lockable Press-In Straw Lid and slim design make this tumbler your daily go-to. The flexible straw allows for easy drinking from any angle, enhancing your hydration experience. An ergonomic handle offers a comfortable, durable grip for daily use, making hydration effortless. Hydro Flask stands behind our durable and robust materials and is committed to high standards.