In a medium saucepan, stir together the sugar and water.
Bring to a boil, stir until sugar is dissolved while boiling for about 1 minute.
Remove pan from heat and stir in flavored drink mix or extract. If using extract start with 1/2 teaspoon then add more to taste if needed.
Allow to cool completely and transfer to container for pouring. Syrup will get thicker as it cools.
Prepare shaved ice and pour on top.