Made of 304 austenitic stainless steel and plastic material is made of food grade PP, food grade silicone seal. Durable and lightweight, it can take a beating and still provide you with an ice cold drink.COMPACT DESIAGN EASY TO CARRY : 500ml capacity is perfect for staying hydrated while behind a desk at work, at school or spending time outdoors.REMARKABLE TECHNOLOGY:  Vacuum Insulated for Cold or Hot Drinks, Keep your cold drinks perfectly chilled for this durable bottle. Cold liquids stay cold for 24 hours without any condensation on the outside of the bottle. Hot liquids stay hot for 12 hours. Vacuum Insulated for Cold or Hot Drinks, Keep your cold drinks