Rhubarb Soda/Cocktail

From Culinate.
Ingredients:
1 1/2 cups rhubarb, roughly chopped
1 cup sugar
1 1/2 cups water
Sparkling water
Ice
2 shots vodka (optional)

Place rhubarb, sugar, and 11/2 cups of water in a saucepan. Bring to a boil, then turn down to a simmer. Cook for about 15 minutes, until the syrup is bright pink.
Turn off the heat and allow to cool. Strain syrup into a large jar.
To make each soda, measure 1/4 cup rhubarb syrup into a glass. Add enough sparkling water to fill the glass 2/3 full. Stir to mix, then add ice. For cocktails, add 2 shots of vodka before the sparkling water.