12-Pack Universal Pop Bottle Waterer for birds or small animals

NOTE: This is a pack of 12 individual Universal Pop Bottle Waterers. They work on old fashioned snap on pop bottles and they snap on 12 or 16 ounce bottles. Waterers fits through 1'' square opening in cage or pen to supply adequate water for birds or small animals. Waterer supplied with spring to hold bottle. Please note: purchase does NOT include a bottle.