large-capacity, double-walled stainless steel vacuum insulation bottles

designed for outdoor sports, travel, and school. They feature a distinct ribbed lower body, integrated rigid overhead carrying handles, and detachable nylon shoulder straps woven.
Key Specifications & FeaturesMaterial: Typically constructed with premium 316 stainless steel (or 304 food-grade stainless steel) for advanced corrosion resistance and flavor purity.Capacity: Commonly available in large 800ml and 1000ml (1 Liter) variants.Temperature Retention: The vacuum insulation layer maintains temperatures for both hot and cold liquids for up to 12 hours.Cap System: Features a multi-use cap configuration, incorporating an inner pop-up sip/straw lid alongside an external metallic cap that doubles as a serving cup.