| 摘要 |
An improved watering device comprises a cap member including a fastening portion provided at the upper side thereof for screwing with a container, and including a hollow tapered insertion element couplingly disposed at the lower side thereof and communicating with the fastening portion for forming a water passageway therein, and the cap member containing an air flowing duct extending in the air venting end of the cap member and having an air admitting end formed at the outer portion thereof for screwing with a rotating knob, wherein the air admitting end of the air flowing duct includes a tapered outer thread portion attached thereon so that as screwing with the rotating knob, an air admitting sacs between the inner and outer thread portions may be formed, thereby the outside air may flow into the air flowing duct, any by using the control member, the outflow amount of fluid may be stably regulated.
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