Premium 304 stainless steel vacuum flask with double-wall insulation for superior temperature retention (keeps liquids hot/cold for 12+ hours). Sleek 350ml-1L capacity options suit office, gym, travel, or outdoor adventures. Features precision laser welding for airtight seal and customizable logo branding (ideal for corporate gifts/promotions). BPA-free, rust-resistant construction with polished brushed finish for professional aesthetics. Includes leak-proof swing lid with ergonomic carry handle. Commercial bulk pricing available for wholesale buyers. Ships globally with factory-direct quality assurance.