Use an empty bottle to puncture the watermelon. Just twist the bottle into the rind and pull back out until you have a small hole that goes all the way down to the flesh.
2.
Place the full vodka bottle upside down in the hole. Refrigerate for 2 to 3 days until all the vodka is absorbed into the fruit.
3.
When your guests arrive, take the watermelon out of the fridge and cut big chunks for everyone to taste.
Note
This watermelon is extremely alcoholic. Be careful after consuming, as you will be intoxicated.