alima The legend had it (apocryphal) that Nelson's body was brought home preserved in a keg of rum, but by the time he arrived back in Britain, all the rum had vanished - said to be due to people dropping in to pay their respects and tapping the barrel. More likely evaporation.
(By tapping, I don't mean knocking it, I mean tapping as a pub landlord taps it.)
A second lieutenant I know said that they used to be sent to measure out the tots for the spirit ration, but was only supposed to spend a limited time in the enclosed space with the barrel open, and had to be in pairs. I imagine it was also so that they didn't have time to help themselves!