The Pornstar Martini (aka Passion Fruit Martini for those at Bacardi who didn't dare to trademark that naughty name) - Pro Review:

Place equal weight amounts of caster sugar and water in a small pan. Heat until sugar completely dissolves. Then take off the heat and leave to cool completely before using. To Make Passionfruit Martinislime juice: ideally, freshly squeezed. Omit it if you don’t like sour drinks – passionfruit puree is rather tart in itself. We make our Easy Passionfruit Martinis with puree, lime juice, sugar syrup, vodka and grape juice. However, if you feel that you need your drink a bit stronger and a bit more special, you can substitute the grape juice with champagne or other sparkling wine and add an extra teaspoon of sugar syrup! Our Easy Passion Fruit Vodka Martini is rather tart anyway, so feel free to adjust the sweetness by adding more or less sugar syrup. You will need: