Premium 500ml double-wall vacuum insulated stainless steel thermos for maximum temperature retention (12H hot/24H cold). Military-grade 304 stainless steel interior resists rust and odors while BPA-free food-grade materials ensure safety. Ultra-sleek brushed finish with precision-welded seams for durability. Leakproof screw-top lid features one-handed push-button operation with 360° sipping capability. Ideal for outdoor adventures, office commutes, gym sessions and road trips. Commercial-grade construction withstands daily industrial use with reinforced base. Ergonomic narrow-neck design fits standard car cup holders. Ships in bulk quantities with wholesale pricing for global distributors.