Pisco Punch

Combine pineapple with pisco in a nonreactive bowl. Cover, and refrigerate for 3 days (make sure fruit is submerged). Bring sugar and water to a boil; stir to dissolve. Let syrup cool. Stir 1/2 cup syrup and lime juice into pisco mixture. Fill 6 glasses with ice and punch. Garnish with soaked pineapple.