Add 4 cups of ice-cold vodka (keep the vodka bottle in the freezer until you need it) and stir. Mix vigorously, until all the gelatin is dissolved. Empty all four packages into a large bowl, and add 4 cups of boiling water. You can also spray the inside of each cup with a little cooking spray, such as Pam, to make the shots slide out easily when they're done. First, you'll want to set out your shot glasses on trays to make them easy to transport because they'll be coming in and out of the fridge multiple times.The most common flavor combination is cherry-orange-lemon-lime-blueberry, but the most important thing is choosing the right colors.
