The Stainless King series blends modern technology with a dash of the past, providing reliable products that stand up to the demands of everyday life. 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 go. With a 5 year guarantee, this flask will be ready for your next adventure for years to come! Specifications THERMOS vacuum insulation technology for maximum temperature retention, hot or cold. Durable stainless steel interior and exterior Cool to the touch with hot liquids, sweat-proof with cold Insulated stainless steel serving cup Twist a