1 oz of blue curacao liqueur
1 oz of Vodka
4 oz of sobe energy drink (or citrus-flavored energy drink)
Fill a highball glass half way with ice cubes, then combine all liquids and pour over the ice. The drink turns a nice unearthly green colour. You can add more or less Sobe if desired. Other energy drinks can be substituted; AMP is a good alternative.