Vaccume Steel Water Bottle 300 ML Insulation: Vaccume Insulation keeps liquid Hot & Cold Sturdy Construction: Fabricated Inside & Outside in 18/8 quality stainless steel. Which is rust proof Usage: 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 temperature. Do not use for carbonated drinks