The Klean Kanteen Vacuum Insulated Tumbler 470ml is Klean Kanteen's best cup solution for hot coffee, cold brew, tea, beer, cocktails and water. The 470ml Insulated Tumbler will keep drinks hot for 4 hours and iced for 20. The splash resistant Tumbler Lid helps keeps drinks contained, is easy to drink from, clean and crafted from BPA-free polypropylene #5 and food-grade silicone. Tumbler is crafted from high quality, durable food grade 18/8 stainless steel with wide 3.08 inch (78mm) opening. Electropolished interior and rounded corners make the Vacuum Insulated Tumbler 470ml cup easy to clean and maintain. All Klean Kanteen products are made using safe healthy materials and backed by the Strong as Steel Guarantee. Hand washing recommended.