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Here's what other sites are saying:
Combining the thermal properties of an insulated vacuum bottle with the lightweight, flexible features of a plastic bottle, Polar Bottle's insulated water bottle is the ideal choice for active people. Simply fill with liquid and ice and hit the trail. For even longer cooling power, fill your insulated bottle and store it in the freezer before use. Either way, it will keep liquids cold twice as long as conventional water bottles.
Drinking water stays cool in the insulated sport water bottle. The double wall construction and reflective foil layer form a thermal barrier that effectively insulates. Fits a standard bicycle cage. Dishwasher safe.
- Vargo Outdoors