Hermit Crab autofeeder - keep supplemental foods in your crabitat 24/7! Each 1 oz tube holds several tablespoons of hermit crab food such as worm castings, greensand or oyster shell flour. Fill up each tube with the provided funnel, twist into a feeding dish and flip over for a crab safe auto feeder. Use one dish, two dishes, or all three. The dishes easily snap together for more stability