How to Make It
In a large pitcher, mix the tomato juice with the vodka, lemon juice, horseradish, Sriracha, Worcestershire sauce and celery seed and season with salt and pepper. Cover and refrigerate until chilled, about 1 hour.
Thread a caper berry and a pickled onion on each of four toothpicks. Fill glasses with ice and add the Bloody Mary. Garnish each drink with a celery stalk, a caper berry-onion toothpick and serve.