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A Vacuum Insulated Bottle Water Flask is a portable, double-walled container designed to maintain the temperature of beverages for extended periods. Constructed with stainless steel or similar durable, non-toxic materials, these flasks are often equipped with a vacuum seal between the inner and outer walls. This vacuum insulation minimizes heat transfer, keeping liquids cold for up to 24 hours or hot for up to 12 hours, depending on the model.Ideal for both hot and cold drinks, they come with leak-proof lids and often feature user-friendly designs like ergonomic handles, slip-resistant surfaces, and wide mouths for easy filling and cleaning.