Mi Vacuum Flask - White

12H Cold/Warm Keeping Insulation Water Bottle: With built-in external copper reflective layer and internal inner wall mirror, Mi Vacuum Flask can effectively delay the thermal convection and heat Conduction between your beverage and the outside air, maintains drink temperature for 12hours.So you can enjoy a cup at anytime anywhere freely,no matter what the weather outside Just the Right Size/Weight Travel Mug: featured with 500ml meets your everyday hydration needs in one containerTravel & To-Go Drink-ware,smaller volume and ultra-light. Portable for backpack in daily life at home,office,school,training ,camping,travel.