its all about physics
There IS no opening on the top which, i've discovered, is due to physics & water. A top opening would let air through & the water level in the container would never be higher than the level in the bowl defeating the object of having a feeder of this kind. This does not apply to food. I have the purpose built one for food only which CAN be re-filled from the top. Once the physics is clear it is a simple but sturdy product. The container separates easily from the bowl & its easy to clean.
(26/03/07)
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