Isn't it funny how you have to research even the most flippant remark our characters make?
One of mine made an observation about scotch and after I typed it, I figured I'd better look it up because I'm not much of a drinker and I certainly don't know anything about scotch.
Margaritas? Yes. Scotch? Not so much.
I landed on THIS page (thank you Google Gods!)
I learned the age of scotch is NOT the time that passes between creation and your glass. Ohhhh, no. It's measured by the length of time it matured in the cask before being bottled. So if you buy a 10 year old scotch today and put it in your pantry for 30 years, it will still be a 10 year old scotch.