Name: Hand Pump
Description: I've been filling in a lake with water and was disappointed to find that I can't use water cells to pour water on the ground, so I was forced to use buckets. The tedium of constantly refilling and emptying the same 7 or 8 buckets with water was tiring, so I thought why not make some sort of "bucket" that can hold more than one block's worth of water. I imagined some sort of pump with a hose could suck up water, and cells could store it. If we take a Pump and surround it with 8 Empty Cells, we should get some sort of Hand Pump that can hold 8 buckets worth of water. Each right click on a water source fills it with one bucket of water, and one right click on an empty square empties one bucket of water, much like a bucket does. This way I can transfer 8 buckets of water at a time in only one inventory slot, instead of with 8 separate buckets! I imagine the little green bar under the tool would indicate how much water is in there rather than energy, since it can be powered by hand.
Recipe: 1 Pump in the middle surrounded by 8 Empty Cells.
Tl;DR: Acts like a bucket with 8 uses instead of one.