Description: Double Wall Vacuum Insulation Technology ,the Air Between The Two Walls Is Sucked Out, In Order To Prevent Outside Temperature To Affect The Liquid Inside The Mug. You Can Turn It Upside Down, Shake It Up, Roll It, The Liquid Will Not Spill. Keeps Hot Liquid Hot And Cold Liquid Cold For Hours. Cup Is Designed To Be Easy To Clean And Dishwasher Safe. Durable, Impact-Resistant Construction And Finger Carry Loop. Specification: Size: 23 * 6 cm Type: Water Bottle Material: 304 Stainless Steel Color: Gold, Pink,White (Optional) Capacity: 450ml Function: Keep The Water Hot Or Cooling Package Includes: 1 x Vacuum Cup