Cranberry sea breeze punch

Using two ice cube trays, put one or two cranberries in each square, fill with water and freeze until solid. Can be done a week ahead.

Pour the cranberry juice, vodka and grapefruit juice into a punch bowl or large pouring jug and add the lime slices. Add some ice and half the cranberry ice cubes. Divide the remaining cranberry ice cubes between the glasses, then pour in the punch.