I think a BBQ box with a lower portion that was to hold the charcoal would be cool
but not sure if others think so
I use a old soft cooler charcoal sits next to it
just remember the IGT is all based off units so 2 unit table or 3 or 4
things like the bamboo sides you can slide in might be a bit longer but the width is the same so if you made a 3 space table do 3 even slip in sleeves so I can slide in my bamboo sides or the inerts even the stainless inserts
the legs if you have a two space and tall legs won't fit so a separate case for that some have the sitting height or standing height I have both and even the short ones
a leg case could be tricky since you have three lengths of legs and 3 lengths of tables so someone with a 2 space table or 3 space and tall legs the legs won't fit anyway and not sure someone with sitting height legs would want to buy a long bag so you would need two bags