Mazama - Hydration Pack Bladder Pump Kit - High-Flow - Rinsing & Washing Squeeze to squirt for instant gratification; pack strap attachment system Bite-valve or squirt flow Barbed quick connector for attachment to standard 1/4 inner-diameter drink tubes Made with taste-free, BPA-free, food grade silicone Satisfaction Guaranteed; We stand behind our products. We know they are high quality and built to last in the outdoors; but if for any reason you are unsatisfied, return your water bladder hydration system for a full refund.