1. Combine 9 cups water and Old Bay seasoning in a Dutch oven. Bring to a boil; add shrimp. Cover, remove from heat, and let stand 15 to 20 minutes or just until shrimp turn pink. Drain well.
2. Place cooked shrimp in a glass bowl. Cover and chill 2 to 24 hours. Garnish, if desired; serve with sauces.