Make your ice cubes by adding water to a large ice cube tray. This is the exact tray I use. Wash the rosemary and dry it very well. This will prevent freezer burn. Add in the fruit and put in the freezer overnight. You can put it in a plastic bag or wrap it in plastic wrap to further prevent freezer burn.

Add 1 1/2 ounces cranberry vodka to each highball glass.

Remove one of the ice cubes from tray for each drink you're making.

Pour tonic over ice cube.

Enjoy.