This is an 8 ounce plastic spray bottle of Sterisol Spray by Trophy Music. It is ready-to-use on all wind instruments, brass or woodwind. It cleans, deordorizes, and freshens mouthpieces. It achieves positive cleaning action in one minute. Safe to use. Non-irritating to mouth and throat, non-poisonous, harmless to metals, lacquer, wood, hard rubber, and plastic. Easy to use. Immerse mouthpiece for one minute, rinse with clean water then dry. a This convenient 8 ounce size can be refilled.