Water Eaters are an item sold in Tom's shop that, when tossed into the water, swell into massive, wobbling, gelatine-like walls that block water from entering, while sucking up the water between them, creating dry land.
City of the Rats
The following instructions were found on the back of the box:
Use with Care
Scatter Water Eaters sparingly wherever land is required.WARNING!Effective for one hour only.
Handle with care.
Do not eat.
Store in dry place
*Note: The makers of "Water Eaters" are not responsible for any death, injuries, damages or other disasters that may occur before, during or after the use of this product.