The sanitizer injector makes it easy to squirt sanitizer into bottles, while allowing them to quickly drain back into the reservoir. Use with Star San, sulphite solution, or your favorite sanitizer. Simply fill the reservoir about half way with your solution, put a bottle on the nozzle, and pump about 2-3 times to squirt sanitizer into the bottle. Hold upside down for a few seconds to let the sanitizer drain, then move the bottle to a bottle tree or clean area for draining. Can be used as a stand-alone table top unit, or will fit on the top of our 45, 81 and 90 seat bottle trees.