Special equipment: Four 7/8-ounce test tubes, 1 small beaker
For the blood count: Combine the Bloody Mary mix and vodka in a test tube. Set the test tube in a beaker.
For the electron: Combine the rum, curacao and soda in a second test tube. Transfer the test tube to the beaker.
For the experiment: Pour the peach schnapps into a third test tube. Add the Irish cream liqueur and grenadine. Transfer the test tube to the beaker.
For the oxygen: Pour the gin and grapefruit juice into a fourth test tube. Set the test tube in the beaker.
Serve the beaker. The Lab Rack is intended as a shareable cocktail.