Double Wall Vacuum Insulation: Keeps water cold for up to 18 hours on long rides Premium Stainless Steel: Durable 18/8 construction built to withstand rugged use No Squeeze Required: High flow cap delivers fast hydration with a simple lift and sip Leakproof Lockout: Prevents spills and splashes during transport or intense ride Optimized Cage Fit: Securely fits most bike bottle cages for a stable, rattle-free ride