There's a reason gin and tonic is the quintessential summer drink, and it's not just the crisp, refreshing flavor: It prevents malaria.
Well, so thought the 19th-century British officers stationed in India who took to mixing their prescribed quinine (in the form of "tonic water") with their daily ration of gin to make it more palatable. It's since been found that, though quinine is an effective prophylactic against malaria, the amount found in a typical cocktail or three's worth of tonic water isn't enough to be effective.
So, you could claim to be drinking this Remixed G-and-T for its parasite-suppressant properties (note, though: It has none). The truth is you'll be drinking it because nobody can turn down a frozen drink in the summertime. Between the global popularity of the gin and tonic and the almost equally widespread love of a slushy when it's hot out, this Remix will make you summer's most acclaimed host.
I got around the problem of blending carbonated tonic water (not a good idea) by using a tonic syrup, commonly used by finicky mixologists who want to adjust bitterness levels to their exacting requirements. I added some simple syrup because frozen things always need the flavors bumped up (the colder the liquid, the less you can taste it, which is why you should definitely be suspicious of anything labeled "always serve chilled"). And if you dread cleaning the blender jar after a party, remember: A standard Mason jar will fit right into your blender's blade assembly, and serve as a classic summer glassware choice besides.
2 ounces gin
4 ounces tonic water
Pour gin and tonic over ice in a rocks or highball glass. Rub lime wedge around glass rim, drop into drink and serve.
2 ounces gin
1/2 ounce tonic syrup *
1/2 ounce simple syrup
1/2 ounce fresh lime juice
fresh rosemary (optional)
Combine the gin, syrups and juice in a blender with a cup of ice and blend until slushy. Pour into a tall glass or Mason jar and garnish with a thin slice of lime and a lightly bruised sprig of rosemary.
* I used Strong Tonic syrup, but I'm brand-agnostic (though Jack Rudy is also good). This may be an item you'll have to order online.