I have several different setups, all inexpensive. I had good luck with veggies, using the submerged ziplock, and a large stockpot(20 qts, and a good fitting lid). With a gas stove, and a large pot, it would hold within 1 deg F for 12 hours at the 183-185 range (takes a lot of fiddle time to find the right setting, but it's cheap). I had better results with "freezer" bags than the less expensive ones.