From Polar Bottles: 

As cycling enthusiasts, we know a thing or two about power sprints, brutal hills, and relishing the downhill ride. We also know there’s nothing better than taking a big swig of cold water, hours after its poured. So, we built the Breakaway® Insulated bottle for road warriors like us—those who sweat hard, hydrate harder, and demand replenishment. Your liquids will stay cool twice as long, thanks to the Tri-Layer™ insulation and radiant heat reflective technology. Plus, we’ve re-engineered it to lighten your ride while still delivering simple hydration. The compact and durable design fits most bike cages and includes a high-flow, self-sealing Surge Cap™ for spill-proof transport.