Q-NaA bourbon rule keeps the world in casks
Most of a whisky's colour and aroma comes from the cask. The two you meet most often are ex-bourbon and ex-sherry. US rules require bourbon to be aged in new charred oak, so once-used barrels pile up and travel to distilleries all over the world. Ex-bourbon casks tend to give vanilla and honey notes; ex-sherry casks give something darker, closer to raisin and nuts. In Japan, mizunara oak is also used, and it is often described as giving a sandalwood-like scent. The same spirit in a different cask becomes a different whisky, which makes cask comparisons an easy way in.
Q-NaThe "single" in single malt is not one cask
The "single" in single malt means a single distillery, not a single cask. What is in the bottle is usually dozens of casks from that one distillery, married together to hit a house style. A bottling from one cask alone is labelled single cask, which is a different thing. Blended whisky combines malt from several distilleries with grain whisky made from corn or other cereals; the grain rounds off the stronger malts, which makes the whisky easy to drink and easier to price. Neither style outranks the other.
Q-NaA few drops of water change what you smell
At high strength, the alcohol hits your nose first and hides what is behind it. Adding a few drops of water lowers the strength, softens that hit, and lets the fruit and cereal notes come through. That small jug of water in a bar, separate from the chaser, is there for exactly this. Too much water and the flavour goes thin and vague, so add a few drops, smell it, then decide whether to add more. Ice does something similar, but the cold also keeps the aroma from coming out.
Q-NaA highball is won or lost on how much you stir
Making a highball at home is mostly about order. Fill the glass to the top with ice, stir once to chill the glass, then pour off the melt water. Add the whisky and stir once more, just enough to chill the spirit. Pour in well-chilled soda down the side of the glass rather than onto the ice. Finish by sliding a bar spoon to the bottom and lifting it once. Every extra stir costs you bubbles, so keep it to one. Warm soda undoes all of the above. If you want lemon, one twist of peel at the end to drop a little oil in is plenty.
Q-NaA little vanishes every year
A cask is wood, so it never seals completely and some of the whisky evaporates. That loss is called the angels' share. In Scotland it is usually put at around 2% a year, which means close to a fifth is gone after ten years. In hot, dry places it goes faster. What stays behind takes up more of what the wood has to give, and the flavour deepens. Long-aged whisky costs what it costs partly because of the time, and partly because you are paying for what disappeared. Step into a warehouse and the air itself smells sweet: that is the missing whisky, out in the room.