Our 470ml flask is ideal for busy lifestyles with a stainless steel interior and exterior making it more durable than glass-lined flasks whilst also being cool to touch when filled with hot liquid and sweat-proof when filled with cold liquid|It features Thermos vacuum insulation technology, keeping liquids hot for 18 hours or cold for 24 hours|With a twist and pour stopper that lets you pour without removing the stopper, and also including a stainless steel cup, it is perfect for a life on the move|With a 50 year guarantee, this flask will be ready for your next adventure for years to come!