Why does everyone say that this is useless?? We buy all of our peanut butter from the grinding machine at our local market. It has a giant hopper of shelled, dry-roasted, unsalted peanuts, and a big switch. Throw the switch and out comes the PB. We currently re-use machine washed plastic tubs from products like yoghurt, cottage cheese and the like (Nancy's yoghurt tubs actually have a three lines printed on the side where you can write in marker what you've re-used it for). But, we like jars better because they are more sturdy and aren't made of plastic.