You'd need to know the species of the pumpkin, or it might be easier to just research if any pumpkin could be in the same family as the gourds. (sorry if I'm getting my family/species/phylum terminology mixed up)
"Hundreds of years from now it will not matter what my bank account was, the sort of house I lived in or the type of car I drove... But the world may be different because I did something so bafflingly crazy that it becomes a tourist destination"
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Solar ovens, haybox cooker - What would you build to go with a rocket oven?