Blue Curacao! It's an orange flavored liqueur but with a deep blue color. I've been making them with both tequila and rum, and both are good, rum is sweeter and you get an oaky vanilla taste. I use about 1.5 cups of rum/tequila, 1 cup of lime juice, 1 cup of blue Curacao and about 1/4 cup of sugar (to personal taste though, lime juice makes them super tart) you could drink them neat, but since it's been in the 90s, I add as much ice as the blender will take and let it rip! Pretty much fills up the entire pitcher, and makes about 6 drinks, 2 drinks a piece for 3 people. I had a little extra rum (self medicating with my old man always around) and should have worn a diaper last night