8 ounces (1 cup) lychee syrup, reserved from canned lychees
3 ounces cranberry juice
Place the ice in 4 glasses. Divide the soda water equally among the glasses. Repeat with the vodka and lychee syrup, pouring them over the ice and soda water. Divide the cranberry juice equally among the glasses. Place one whole lychee in each glass for garnish.