56540b4c_Crafting_Guide___Raw_Materials__Description
[Name] Sponge [Uses] Water removal [Description] 
Obtained from smelting a Wet Sponge. Sponge will remove water touching it in a 5x5x5 area around it. After absorbing water, it will turn back into a Wet Sponge.
Minecraft Crafting Guide - Raw Materials
Description