As any aficionado knows, many spirits are best served ‘on the rocks’. Add a few ice cubes into the glass, and the taste just seems to come alive – the chill takes the edge off, while allowing some of the more complex flavours and aromas to come through. Overdo it with the ice, though, and you’ll end up with a diluted dark and stormy, or an overly watery whisky. Don’t worry. You can strike a perfect balance every time with this clever solution from BarCraft: a silicone ice tray that makes giant, slow-melting ice cubes.