Place lime pieces in a 12-ounce glass and top with mint leaves and cane sugar. Using a muddler, crush the lime pieces while bruising the mint with the sugar. Fill the glass just below the rim with the ice. Add the mint syrup, coconut milk, pineapple juice, pineapple rum and the coconut rum. Use a shaker to vigorously shake the contents of the glass together for at least 30 seconds. Pour the mojito back in the glass, and top off the glass with seltzer water. Place a sugar cane stick in each glass and garnish with fresh mint leaves. Serve immediately.
Yield: 1 drink