Compost bins are specifically designed for holding compost and speeding the composting process, they require the pile to be tossed every so often. Kitchen composters are smaller units designed for quick use before transferring compost to a larger bin. Aearators are a type of bin that maximize the amount of air that can travel through the bin and compost, which further speeds the process. Tumblers allow you to spin or turn the compost around by easily moving the composter, which eliminates the need to manually turn it. Worm composters rely on the use of worms to produce the compost.