A complete hermit crab terrarium must have food available at all times. This ensures that our beloved hermits are being properly provided with the vitamins and minerals they need in order for them to be happy and live long. These hermit crabs are known to be scavengers and tend to make a mess when they eat or hunt for food. Heavy and sturdy, Hermit Crab Feeding Bowl by SunGrow helps prevent crabs from tipping the bowl and therefore helps in keeping your crabitat clean and organized. Aside from using it as food storage, you can also use this as a drinking pool (where crabs can drink, bathe and refill water of their shells), climbing toys and/or by simply making it as one of your attractive yet functional terrarium decors. Measurement - 5.5x5x1" There are many ways that the SunGrow Hermit Crab Sponges benefit your pet hermit crabs. Unlike humans who have lungs to breathe, hermit crabs have modified gills that allow them to live on land. To function properly, the gills require a certain amount of moisture, which the cellulose sponge helps to provide. The 3-pack of Hermit Sponges by SunGrow allows your little climber pets a refuge if they feel too dry. These sponges allow your hermit crabs to get a drink and properly exit their water dishes. As hermit crabs are both climbers and nibblers, cellulose sponges are safe for your pets to consume as there are no artificial additives or any materials that can hurt them. In fact, the sponge acts as a source of water and provides a quick drink whenever your crabs feel thirsty.