KAPALUA, MAUI - "MAI TAI" IS NOT A BUSINESSMAN'S NECKPIECE

From Wikipedia and Trader Vics:

The Original Mai Tai from 1944

Ingredients:

• 2 oz of 17-year old J. Wray & Nephew Rum over shaved ice
• Juice of one lime
• 1/2 oz Holland DeKuyper Orange Curaçao
• 1/4 oz Rock Candy Syrup
• 1/2 oz French Garnier Orgeat Syrup

Method:

• Shake vigorously.
• Add a sprig of fresh mint and spent lime shell

There are more modern bar-friendly versions. 

Whatever the variation, always a refreshing drink on a warm Hawaiian beach.