Isopod Specialist's Poly fiber Container Cups with sealed lids are perfect for housing Isopods, Fruit Flies, and any other insect requiring moisture. Our container cups were designed with the idea of containing even the smallest insect; our lids accomplish that and have the ability to contain and regulate moisture. Our cups are truly great for breeding any insect of your choosing. Sold in 1, 50, and 100 count, and in sizes 2, 4, 6, 8, and 16 ounces.