When I was growing up in the 70's, we had a yogurt maker sort of like this one, but with glass jars and not plastic. My parents weren't hippies. No, that's not the reason we had one...it was because my Dad was a manufacturer's representative for house ware products and he sold this item. I remember the yogurt would come out rich and creamy and very tart. The Eware Home Yogurt Maker delivers the same results. I really like the product. Rich, creamy yogurt for only about 19 cents a container. I think the containers are about 5 ounces. I add powdered milk and use whole milk because my family likes their yogurt thick. The directions are simple and give tips so that you can customize the product to your taste (no pun intended). I'm very happy with this product. Great value and super delivery by Great Offer Stock. I don't think they are selling the cups separately or I'd buy more of them.