Food grade buckets are typically white and a bit thicker than ordinary buckets. Most are marked something like USDA and the likes. Hope that helps a bit Hammer. Most restaurants will give them to you if you ask. A lot of them are square also.Didn't read the whole 28 pages, but can I ask about the "food grade buckets" mentioned on the first page? Do regular plastic buckets, like those orange home depot buckets, leach out chemicals or something?