What you need:
Root beer Schnapps, Raspberry Liqueur, 7UP, Lime Margarita Mix
Shot Glass, Small Tumbler
Pour equal parts of the Raspberry Liqueur and Root beer Schnapps into the shot glass.
Fill the tumbler 2/3 of the way with 7UP and add 1oz Margarita Mix.
Drop the shot into the 7UP/Margarita Mix glass and enjoy!