Preheat grill to medium-high. Meanwhile, cut off and discard stem end from corn. Leave silky tassels at the top end. Place cobs in Multipurpose Steamer. Cover; microwave on high 5 min. Using oven mitts, gently grip tip of corn with one hand and squeeze. The corn will pop out of the husk.
Meanwhile, using Funnel, add dressing mix, oil, and vinegar to Cruet. Screw on lid; shake to mix.
In a bowl, combine shrimp and 2 tbsp dressing. Stir to coat.