Stir together pisco, pineapple juice, coconut water, lime juice, simple syrup and bitters.
Add one-third of the mixture, 1 egg white and pinch salt to cocktail shaker; shake until foamy. Add ice and shake until ice cold. Strain into 2 short cocktail glasses. Garnish each with pineapple wedge. Serve immediately. Repeat to make 4 more cocktails.
For simple syrup, bring equal parts water and sugar to a boil. Cook until sugar dissolves and then cool completely.