Quart sized plastic bottle with a hand pump and hose that connects to any beer shank, in place of the faucet. Simply remove faucet, coupler or keg connector and connect the cleaning bottle hose to the shank. Pumping the bottle will force cleaner backwards through the line. Allow the cleaner to soak, flush with clean water and re-assemble for better tasting keg beer. Fill bottle with cleaner like BLC or Easy clean for best results.