Vaccume Insulation keeps liquid Hot & Cold. Fabricated Inside & Outside in 18/8 quality stainless steel. Which is rust proof. Use this bottle for tea, coffee, juice etc. Pre-condition your bottle with hot water, if using for hot beverages and with cold water if using for cold beverages. Fill the Bottle Completely to maintain temparature. Do not use for carbonated drinks. Capacity: 500ml,Weight: 325gm, Material: Stainless steel 304, size: H* DIA 26cm *7cm