I mean, I guess it’s reasonable Major Winchester would have some sparkling water ahead of urgent need. We never saw it, but that doesn’t mean anything, especially for sitcoms in the 70s. Fine. But then how much is his family supposed to have shipped out? And just how freaking good is this sparkling water that it’s worth shipping to Korea, compared to the club soda they have in the officer’s club that he’s drinking all the time anyway? If he had a stockpile big enough to take multiple showers with, where was it? Under his bunk? How long did he spend opening and pouring bottles into the shower tank so he could have his? This is the high priority stuff.