Bring 4 cups of water to a boil. Add 8 Tadin Canelita® tea bags to boiling water, cover and steep for 5 minutes.
Remove bags and let tea cool to room temperature (the freezer or fridge will help expedite this step).
While the tea cools, rinse the rice and add it to a blender. Add 2 cups of cooled tea into the blender and pulse to coarsely grind. Pour the contents of the blender into a bowl and top with the remaining 2 cups of Tadin Canelita® tea. Let it sit at room temperature for 3 hours.
After 3 hours, add rice mixture to the blender and blend until smooth. Strain through a fine mesh sieve, stir in sugar and chill until cold.
Before serving, stir well, pour over ice and garnish with a cinnamon stick.