Oops - missed this

Fill a martini shaker 1/2 with ice. Fill with a good vodka lust above the ice. Add a couple ounces of Cointreau (or triple sec), cut 1/2 lime into smaller pieces and squeeze into shaker (throw limes into shaker after squeezing), add a few more ounces of Cranberry.....shake shake shake 10 - 15 secs.

There you go!