Best answer: Almost any size container will work with a Joule. The sous vide tool can handle up to 10 gallons (40 liters) of water and cope with a depth of up to 8 inches (200mm). On the flip side, it can also cook in as little as 1.5 inches (38mm) of water, so you have pretty much free rein when it comes to container size.Smol: Cambro 2-Quart Food Storage Container ($11 at Amazon)Medium: Cuisinart Chef's Classic Enameled Cast Iron 7-Quart Casserole ($76 at Amazon)Absolute unit: EVERIE 12-Quart Sous Vide Container with Silicone Lid ($33 at Amazon)