Adopt double layer structure, made of high-quality steel, vacuum heat treatment, excellent cold and heat preservation effect, and the cup body is not hot to the hand. Electrolytic treatment of the inner tank is not easy to retain bacteria. The streamline design has a unique appearance, which can be consumed directly to the mouth, making it convenient to carry out. Ergonomic design, beautiful design, dynamic vitality. Suitable for outdoor sports, tourism, camping, and adventure.