| 摘要 |
A bottle cap for fitting on a mouth of a bottle to form a bird feeder is disclosed. The bottle cap comprises a first chamber with a opening for receiving the mouth of the bottle, wherein threads are provided on an inner wall of the first chamber so that the cap can be screwed onto the mouth of the bottle. A second chamber is provided with a closed bottom. A sealing ring is located between the first and second chambers so as to provide a seal between the bottle cap and the mouth of the bottle when the bottle cap is screwed onto the mouth of the bottle, wherein liquid is free to move between the first and second chambers. At least one feeding port is provided in a side wall of the second chamber.
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