Be on the lookout for this hangtag on the Sunkist 2 liter bottle.  “Save $1.00 on One 2-Liter Bottle of any flavor Sunkist Soda with the purchase of one Watermelon”.  Sunkist 2- liter bottles range from $1-1.12, so you could get a bottle for free or very close to free when you purchase a Watermelon.   Sounds like we are having Watermelon at our Labor Day BBQ.