This drinking bottle 400 ml is made of healthy, durable, rust-resistant aluminum steel. The bottle design makes this mug ideal for travelers. This Leak-proof mug has an easy-to-grab strap perfect for the gym, bicycle, or any other type of workout. Available in a variety of cool colors for men, women, boys, and girls. Your drinks keep their temperature for long hours even during travel and camping! Also this drinking bottle is Eco-friendly - Made from food-grade stainless steel, no chemicals nor metallic tastes, giving you the purest, most refreshing beverages wherever you go.