I happen to like wine as a field beverage. two buck chuck cabernet, no need to ice it, goes a long way. Good water bottle aftewards.
I use the corkscrew probably once a week for wine. several years ago my wife and i had a series of huge garage sales and minimized some stuff (then moved onto a boat, then back to davis, etc) and discovered that the SAK can be your ONLY can opener, bottle opener, and wine key.
The corkscrew also serves an *indespensible* function in holding the straight pin IN and in carrying the jeweler's screwdriver. I use both more than once a week.
And you can work cordage with it, too!