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.
How to Make Your Own Reed Diffusers And Refill Oils With A Few Simple Ingredients -- 1/4 cup carrier oil (almond, safflower or mineral), 12 drops essential oil for scent, and a splash of vodka or rubbing alcohol.