Is it possible to make a pumpkin airtight after cutting the top out to scoop out the seeds, or to use a technical term, pumpkin guts? While the wort was happily boiling, we cut the top of the pumpkin off with a butcher knife and scooped out what seemed like 20 pounds of seeds and those weird stringy pumpkin intestines. Since our pumpkin had an odd shape we duct taped it to half a plastic barrel to add stability. We stuck an airlock in the pumpkin lid to release the pressure but this turned out to just be mainly ornamental, since the top of the pumpkin was in no way airtight.
Can a pumpkin be sterilized? Short answer, no. However, my thoughts were, "Hey, what kind of bacteria can live inside a pumpkin anyway?" With this kind of negative thinking dashed aside, we left our pumpkin vessel alone and drank another beer, adding a can of cooked pumpkin to the wort for a double dose of gourd.
Will a pumpkin hold water? If so, for how long? This may sound silly but it was a legitimate concern. Was our pumpkin going to get soggy and precious beer start seeping from its pores? In this respect, we hedged our bets by only keeping the beer in the pumpkin for 24 hours, and then we moved it to a carboy and proceeded like any other beer.