Tequila Sunrise: Fresh squeezed orange juice, tequila, and grenadine. Shake 4 measures orange juice and 2 measures tequila in ice, and strain into cup. Add 1/2 measure grenadine by pouring slowly down the back of a spoon to get a nice red-yellow gradient.

I've noticed some of the classier bars in Korea will substitute blue curacao for orange juice, due to the unavailabilty of fresh oranges. Blue curacao is an orange flavored liquour. This results in a sweeter, but (much) more potent cocktail, with a red-blue gradient. Drink after sunset, not during sunrise.