How to make the Summer Sucker – Cut a small, circular hole in the Watermelon. Save the piece cut out. Turn the Watermelon with the hole facing the ground so any Juices drip out. Mix the Vodka, Grenadine Syrup and 7up in a separate bowl. Slowly pour the Mix into the Watermelon (use a funnel if you have one). If you put the liquid too fast into the Watermelon, it won’t absorb properly. Pop the piece you cut out back into the hole. Shake the Melon. Throw it in the fridge for an afternoon. When the family is over, cut slIces out of the Watermelon and enjoy.