Premium 18oz/32oz/64oz stainless steel vacuum flask with triple-layer insulation for 24-hour temperature retention. Features a leak-proof straw lid design for effortless sipping on the go. Military-grade 304 stainless steel interior resists odors and stains, while the brushed exterior prevents scratches. Customizable logo placement available for bulk orders (minimum 100pcs). Ideal for outdoor adventures, gym sessions, or corporate gifting. Durable powder-coated finish withstands daily wear. BPA-free materials meet international safety standards. Wholesale pricing starts at $3.80/unit for 500+ quantities. Ships globally with flexible OEM options.