How to Make It
In a punch bowl, combine the pisco, lemon juice, water, gum syrup and pineapple chunks and refrigerate until chilled, about 2 hours. Add ice. Serve the punch in chilled coupes and garnish with the pineapple slices.
Pineapple gum syrup, thickened pineapple-flavored simple syrup, is available at smallhandfoods.com.