| 摘要 |
A watering device comprises a watering container, a cap, a control knob, and an air tube. The cap is fastened with the water container such that an air inlet of the cap and a channel of a tapered projection of the cap are in communication with the hollow interior of the water container. The tapered projection of the cap is provided with at least one water discharging hole in communication with the air inlet of the cap. The control knob is rotatably fastened with an outer end of the air inlet such that the control knob can be turned to block the air inlet. The air tube is fastened at one end with an inner end of the air inlet such that other end of the air tube is extended into the hollow interior of the water container.
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