Premium 480ml stainless steel vacuum flask with innovative bouncing lip design for spill-proof convenience. Military-grade 18/8 stainless steel interior resists odors and stains while maintaining beverage temperature for 24 hours (hot) or 12 hours (cold). Double-wall vacuum insulation with copper plating enhances thermal efficiency. Ergonomic curved silhouette features sweat-proof matte finish and one-hand operable flip-top. Ideal for office commutes, outdoor adventures, or as a premium Christmas gift. Commercial-grade durability withstands daily use with leak-proof threaded sealing. BPA-free construction meets FDA standards for safe drinking. Bulk pricing available for wholesale purchasers with global logistics support.