WaterChill 12V Pump/Reservoir with USB/Software Control Panel
 

Odd shape or not, the reservoir is very precisely mated to the pump body over the inlet to the impeller making for a very clean look. A small tube is modeled into the back of the reservoir to accommodate a LED which is accessible from the underside of the pump. The position and size of the fill port however may make filling it a bit problematic.

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