While riding in Southeastern New Mexico I discovered the need of an insulated water bottle like the ones pictured from Polar. Foil insulation built into the bottle so that the bottle can be placed in the fridge or freezer for added cooling. With 20 and 24oz. capacities it's nice to have ample supply of cool drinking water when temperatures rise as they tend to during "dog days of August". I prefer to use water containers that are not plastic, however these are now BPA free with toxic plastic hardeners removed. Another bonus is that they're made in the U.S.A., quote from their site:
"At Polar Bottle, we take great pride in producing an American-made product that supports our own local and national economies by providing employment to local workers. Our products are assembled in, and shipped from, our warehouse in Boulder, Colorado with parts sourced from the USA."
I prefer the Camelbak hands free Antidote Reservoir as another BPA free product with proven quality. hands free mode is nice to have when commuting in traffic or when fatigued.