The Tom Collins is one of the oldest cocktails in the book, and its staying power can likely be attributed to the fun that comes with ordering a drink that sounds like one of your dad's friends. It's like a gin and tonic's more refined cousin, with soda water and lemon for a bit of citrus zing. And, like any timeless cocktail, you can basically do whatever you want to it -- for example, adding fresh pear purée and rosemary-clove simple syrup, as DrinksMadeEasy does in the following recipe. A little more seasonal and flavorful, but just as classy as the original. Watch the video above to see how it's done.