Cucumber Mint Seltzer

Almost every mocktail recipe reaches for juice, and by the second glass most of them are cloying. This one has no sugar in it at all. Muddle the cucumber and mint gently — you want to bruise them, not shred them, or the mint turns bitter — then top with plain seltzer and let it sit for a minute before you drink. It is the one on this list that works at a long dinner, because you can have two without tiring of it.