Premium 18/8 stainless steel construction ensures durability and corrosion resistance. Double-wall vacuum insulation maintains temperature for 24 hours hot and 36 hours cold. Mirror-polished interior prevents flavor transfer and simplifies cleaning. Leak-proof screw lid with silicone gasket for secure travel use. Ergonomic narrow mouth design fits standard car cup holders perfectly.

Medical-grade 304 stainless steel interior meets FDA food safety standards. Precision laser welding eliminates exposed seams for superior insulation. Matte exterior finish resists fingerprints and minor scratches. Suitable for office hydration, outdoor adventures, gym sessions, and daily commutes.

Patented copper layer between vacuum walls enhances thermal efficiency. One-piece spinning technology creates seamless body structure. BPA-free materials guarantee health safety. Weight-optimized design (380g) balances capacity and portability. Compatible with most backpack side pockets and bicycle bottle cages.

High-capacity 500ml version available for extended use. Professional-grade powder coating withstands daily impacts. Ultra-fine polishing achieves food-contact surface smoothness. Ideal for coffee enthusiasts, travelers, students, and fitness professionals. Backed by 5-year manufacturer warranty against defects.