The Crabworx Drinking Sponge provides a safe and easy way of providing water to land Hermit Crabs. Hermit Crabs prefer drinking their water through a sponge, and in addition, the Crabworx Drinking Sponge also helps provide humidity to your Hermit Crab's enclosure. The Crabworx Drinking Sponge works great with the Crabworx Drinking Pool.