A drop: a respectable portion of whatever alcohol you are drinking. A wee drop: technically a small drop, this is generally a modest suggestion that no one takes seriously.
According to The Whisky Barrel, a shop in Edinburg that has a webpage and ships worldwide, grain is used to make a weak beer, which is then aged in oak barrels, giving it a distinct flavor that we know as Scotch Whiskey. In America is generally just called Scotch. The Scots are trying to make it clear that this term, Scotch, only applies to whisky, but I don’t know if they’re having much luck. People around the world also use Scotch for plaid, regardless of the colors used, and for anything Scottish, including the people.
The whisky pictured is named after Dougie Maclean’s famous song, “Caledonia”, and he had a hand in choosing its flavor and selling it. That’s not particularly hard when you have to sing the song at every concert you give. If you like contempoarary music of any type I suggest looking Dougie Maclean up.
Whisky comes in all sorts of types. There are many tiny breweries. If someone asks in Scotland, or in the U.K. in general, they ask specifically rather like we do for beer. In the U.S. it’s just “Scotch” or “Scotch on the rocks”. We know that people from Scotland wouldn’t export anything less than first-rate.