Under Armour offers the Under Armour x Thermos 64-oz. Insulated Water Bottle in several colors (Red pictured) for $18.75 with free shipping. That's the lowest price we could find by $6. This BPA-free bottle features double-wall foam insulation, a locking flip-top lid with 1-hand push-button operation, and fold-down carrying handle with integrated fence hooks. Deal ends August 13.