Vendors serve it in tall clear cups specifically so customers can see the shrimp-to-sauce ratio before buying — a visible-quality trick unique to the pier stalls.
Boiled shrimp piled into a tall cup with a chilled tomato-ketchup-lime sauce, onion, and cilantro, often topped with avocado. La Libertad's beachfront and pier vendors sell it as a cooling snack through hot afternoons.