Nuclear doughnuts
While on holiday in Portugal, my daughters have become accustomed, if not addicted, to Panrico Donuts [sic]. These things seem to have a shelf-life measured in millennia. And that's without refrigeration. God knows what's in them, but they must be packed to the gunnels with preservatives.
Along with cockroaches, I'm convinced that these are the only things that could survive a nuclear holocaust.
nucleardo[ugh]nuts.