Summertime and the living is hot! Make sure you keep cool this Summer by getting plenty of water, but it all doesn't have to come from straight H2O. Loads of produce like what you'll find in this recipe for a watermelon-cucumber cooler are full of hydrating water. Stock up on these Summer fruits, grab your slow juicer, and get ready to wow your friends at the next backyard barbecue. Added bonus: this juice is brimming with antioxidants and debloating properties.