Thermos Stainless Steel Vacuum Insulated Hydration Bottle is constructed with durable double wall stainless steel and Thermos vacuum insulation technology. This hydration bottle keeps beverages cold for up to 20 hours. Features an easy-to-use, push-button flip lid with hygienic cover and locking latch for easy, one-handed operation. Capacity: 530 ml. Available in stainless steel colour.