My standard recipe, soaking 10 Skittles for every ounce of vodka. It doesn't really matter what type of vodka that you use (because it tastes like Skittles), but I typically use Smirnoff. I soak the Skittles overnight and shake them up at least 3 times during soaking. To strain the Skittles, I use the cheapest coffee filters. 2 filters at a time (stacked on top of each other), but changing them frequently as the gunk starts to collect at the bottom of the filter.