It is a proven, and verifiable fact, that the moment a rum bottle is uncorked, uncapped, unscrewed, disembunged, or otherwise opened, that the alcohol inside begins to evaporate.......
this, combined with an entire crew of rummed up scalawags can lead to depleted rum stores, but fantastic stories of what the lightweights did while inebriated......
this is why it is advisable to drink it all as quickly as possible, because either way, it's gonna be gone before you know it......it never lasts