This 26-ounce insulated bottle from AO Coolers is designed to keep liquids cold for up to 16 hours or warm for up to 8 hours. Slim enough to fit in standard cup holders, the sleek vacuum thermal bottle features a threaded insulated lid and a copper plated inner wall prevents heat from entering or exiting the bottle by thermal radiation. The copper plating makes a difference of 41 degrees F over 24 hours.
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