one thing about presto pots you have to get use to them and get the temperature just right as little tricky at first make sure if you get one to get the steering arm with it I have two of them and the only time I ever use it is when we are making a big batch otherwise I do not use them at all. there are commercial type which are to thicknesses they use a liquid between the walls they are very expensive if you guys would like more details I can give you the address where to get the commercials at one time I had the opportunity of buying a company and we were looking into all sorts of things one of the things I was looking for was commercial cooking pots for plastics the molds that they had were 100 cavity so you can do some serious shooting but anyway I passed the sadly.