Not sure Andy, from what I saw in the pix which I couldn't get to load here , looked like a pretty good sized cooler (like one you could also use for a seat).
I would think all you would need it one big enough to hold whatever amount of corn + the water + a little bit of "head room" for the steam to work.
Trial and error , but at least not too expensive to try.
73, John
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DE: John W9WLS
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