Can be stored inside your 30 to 36L Vibo waste bins. The small bin is perfectly sized to sit securely on a ridge line that is near the top of the waste bin. A carbon filter lid can be put on the larger bin with the compost bin in the middle. The Small (SM) size carbon filter lid also fits the compost bin. Also useful when you are preparing food, by hanging the handle lip over the edge of your cabinet door under your countertop work surface, you can easily wipe your compost waste away and clean up.