0.5l. Built to Perform. Designed to Impress. Stunning Onebottle™ From Root7 Amazingly Keeps Drink Cold for 30hrs Due to Premium Copper-coated Insulation. Onebottle™ is Best of Both Worlds as Vacuum Insulation Will Also Keep Your Drink Hot for 20hrs. Leak-proof & Sweat-proof So Forget About Getting Water on Your Important Papers, Rings on Your Table, or Watery Mess in Your Bag. Features - Keeps Drink Hot for 20 Hours or Cold for 30 Hours - Unique Copper Coated Inner Layer - Vacuum Thermal Insulated Double Wall - Leak-proof - Non-sweat Painted Outer Coating - Drink Clean: Bpa Free. Minimum Quantity: 12.