Caribbean Sunrise

Fill 2 highball glasses with ice cubes.

In a cocktail shaker or large, lidded jar, shake the vodka, lime juice and pineapple juice together with a handful of ice cubes. Strain into the highball glasses.

Slowly add the grenadine and stand for a minute or so while the grenadine settles into a pink layer at the base of each glass.

Add a slice of pineapple to each drink before serving.