You'll want to do this one over your kitchen sink! Set the watermelon on the counter, and turn it so the hole is facing over the sink at a right angle to the countertop. Tip the bottle of vodka on its side (you may want to pour a little out first, so that you don't waste any), and plug it into the hole. Then, tip both up toward each other until the vodka balances and is fully inside the watermelon.