When making liquor, part of the water and alcohol evaporate... and the amount decreases from what it was originally.

That's called the angels' share. Guess people long ago used to think that angels snuck some drinks out of the barrel.

Hee—!

...But can that really explain such a huge decrease?

This is great~ ♪ Another cup!

Hey, you! This is something you enjoy at only one cup per day!

Bleeeh...