Lava Absorbant Sponge

The Lava Absorbant Sponge [sic] is an item which functions similarly to the Super Absorbant Sponge, except that it absorbs Lava. When used on a tile occupied with lava will cause the lava to disappear without storing it. The Lava Absorbant Sponge can be used an unlimited amount of times and will not deplete. It will only work on lava and will not work on any other liquids. It is awarded randomly by the Angler for completing fishing quests.

It is obtained as a rare drop from fishing in lava.