Royalford Stainless Steel Water Bottle, 350ML Double Walled Insulated Water Flask Keeps Drinks Hot Or Cold For Hours Depending on the type of drink you have put in, this vacuum bottle preserves the drink and keeps it hot or cold. You can enjoy a juice, tea or hot coffee even after hours with the same warmth or icy freshness. Perfect Hydration Companion 350ml style water bottles will keep you hydrated throughout the day. This is great to bring cool drinks or hot coffee to work and will fit in standard bike bottle cages, adult/ kids backpacks or any cup holder for travel. A must have water bottle for travel, hiking, cycling, tennis, camping & office work.