In a small bowl, combine the pretzels, sugar and butter. Press onto the bottom of a greased 11-in. x 7-in. dish. Refrigerate for 30 minutes.
For filling, in a large bowl, combine milk and daiquiri mix. Beat in cream cheese until smooth. Stir in strawberries; fold in whipped topping. Pour over crust (dish will be full). Freeze for 4 hours before serving. Yield: 15 servings.