I bought this thinking I would save some money making my own yogurt. It's easy. You need milk and a "starter". You can either buy a starter packet or use some already made yogurt. You heat the milk up on the stove, then place in this container for 10-12 hours, then you refrigerate it. Finally, you can have some yogurt. It's a good product...except it take a lot of time. I'm still buying organic milk, need to buy the starter, takes some time at home heating, cooling, moving...and then the yogurt itself doesn't last long. I think its a good appliance...but just buy yogurt at the store its easier!