How to Make It
To make the olives, take the two green styrofoam balls and stick them onto the wooden dowel. Once they're placed on the stick, draw an off-center red dot on each green styrofoam ball with the red puff paint. Let the paint dry overnight.
Lay out the green t-shirt on a flat surface. Draw vertical lines from the top of the shirt to the bottom in green puff paint, spacing them about half an inch apart. It's OK if the lines aren't perfectly straight, because celery stalks aren't perfectly straight either. Let the paint dry overnight.
Roll out the red fabric on the floor. (Trust me, you'll need the space.) Loosely measure out how much fabric you'll need to surround the wreath frame by rolling the frame on the fabric and marking with a pen. Cut the fabric at that point. Fold the edge of the fabric over the frame, and secure the edge of the fabric with a dollop of hot glue. Be sure not to burn your fingers. Once cool, trim off any extra fabric.
Once the wreath frame is wrapped in red fabric, take two pieces of yarn and tie them to the wreath frame to make shoulder straps. You'll probably need someone to hold the wreath frame while you tie the yarn.
When you're ready to hit the town in your bloody mary costume, put on the green t-shirt then the red drink itself. If your hair is long enough, tie your hair in a ponytail and stick the fake leaves into your ponytail; alternatively, you can use bobby pins to clip the leaves in place. If you don't have hair that's long enough to support the leaves, you can stick them to a headband with hot glue.
Grab your stick of olives, and walk out the door. Hot sauce is optional, though comes highly recommended.