Add chile pepper slices to cocktail shaker and muddle them with the back of a wooden spoon. Add ice to cocktail shaker, then the mezcal, tequila, Cointreau, simple syrup, pineapple juice, pureed mango, and lime juice.
chile pepper, 2 ounces mezcal, 3 ounces silver tequila, 1 ounce Cointreau, 2 ounces simple syrup, 2 ounces pineapple juice, 2 ounces pureed mango, 2 ounces lime juice