Let me explain, with the HopeSaC, you get to choose which size of pot to use when cooking your meal. (Usually when purchasing a thermal cooker, it is basically a “one size fits all pot”). Cooking for a full house? Use a pot as large as 8-liters. Only a few of you home tonight? Use a smaller pot. The pot must have a lid and its nice if the handles are located toward the top of the pot, but other than that any pot will do.