TRI-LAYER INSULATED WATER BOTTLE: The original, 100% BPA-free bicycle insulated water bottle. Tri-layer Insulation combines an external reflective heat shield with layers of insulating foam to keep liquids cool. DESIGNED FOR BIKE CAGES: Made for cyclists by cyclists, the Polar Surge bottle fits a variety of Bike frame sizes and bottle cages. EASY TO SQUEEZE: Flexible, ultra-light materials and a unique grip groove combine for a sure hold and high-flow squeeze. HIGH-FLOW, SELF-SEALING CAP: The Surge Cap maximizes flow rate and self-seals to eliminate spills and splatter. It’s spill-proof when open and pushes closed for leakproof transport. EASY TO CLEAN: The innovative Surge Cap is two pieces, cap and valve, simply twist and pull for complete access cleaning. Dishwasher safe. When we say easy, we mean it. POLAR BOTTLE JOINS HYRDAPAK: Polar Bottle set the standard with the world’s first insulated, BPA-free sports bottle. That legacy continues under the HydraPak brand, where Polar Bottle’s pioneering technology merges with HydraPak’s commitment to cutting-edge performance and reliability.