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.
Skittle vodka, use any type of vodka. you will need Skittles (20-25 candies per 350 ml or 12 oz of vodka) use as many colors as you like, usually one color or two is the best. let the skittles stay in the vodka for 24- 48 hours, shake it every once in a while. After a day or two use a coffee filter to drain the remainding skittles out of the vodka. when served, mix with 7-up :) yummmm