Fill your blender with ice. Add your desired amount of vodka (2-3 oz. per cup/1 oz. per color). Add desired amount of sugar (if making large batch use recommended serving on Koolaid). Add your color of Koolaid (if making a big batch use whole pack/if making single serving use less). Add water 1/2 - 1 cup is about right but adjust it so it’s an actual slushy when blended. Pour into mason jar. My favorite way is to have different colors of Koolaid and layer them so they look really cool! Add your choice of candy to the top for garnish.