pour the pomegranate juice into an ice tray an freeze overnight. Put the lemon juice an sugar in a small sauce pan an bring to a simmer;cook, stirring, until sugar is completely dissolved. cool to room temp.
to serve, fill each of four tall rocks glasses with 3 to 4 pomegranate ice cubes; pour about 1/4 cup lemon syrup an 11/2 ounces vodka over the ice an top off with setzer. stir gently, garnish the glasses with lemon wheels,an serve ummmmmm