Polar Bottle Surge Ascent

Insulated high-flow hydration
Surge valve delivers a solid stream, then self-seals to eliminate drips and spills
Engineered Cool: Tri-layer insulation combines an external reflective heat shield with two layers of insulating foam to keep liquids cool
Easy to squeeze thanks to its flexible, ultra-light materials and the unique grip groove
Easy To Clean: The cap's two pieces, the lid and the valve easily separate for top-rack dishwasher cleaning