What's you favorite summer drink?

 - by New Deal democrat

Here's a question for a summer Sunday:  what is your favorite summertime beverage, alcoholic or not?

Last summer I started working on concocting my perfect summer libation.  I know I want lime, mint, vodka, and ice, but I don't want it overly sweet (so not a mojito), and I don't want a bitter aftertaste (so not a vodka and tonic).  I've been experimenting so far with seltzer water, ginger ale, peppermint schnapps, and creme de menthe among other things, but still haven't found just the right combination.

Of course, all of this experimentation has required repeated and extensive testing!

So, what's your favorite liquid relaxation to beat the heat?