While many martinis have the reputation for being fat and calorically rich, this does not mean you have to avoid this drink altogether. Simply pick the right ingredients and sip away. One healthy version is the sour-apple martini. Combine 2½ oz of sour mix with ¾ oz each of sour apple liqueur and vodka. Garnish with a small slice of apple and you can enjoy a cocktail with around 160 calories