Add ice cubes, vodka, lime juice, coconut milk and pineapple juice to a cocktail shaker.

Add cap and shake vigorously for about 30 seconds or until well-chilled.

Place a few graham crackers in a small ziploc bag and seal. Use a rolling pin to roll over graham crackers to crush.

Coat the rim of a martini glass with lime juice. Roll in graham cracker crumbs.

Strain cocktail into the martini glass and garnish with a lime slice. Cheers!