Refreshing summer beverage.
Puree watermelon in blender until smooth. Pour into 2 quart pitcher. Stir in lemonade and limeade concentrates until completely melted. Cover, refrigerate overnight. When ready to serve, fill 10-oz. glass with ice cubes and 1/2 to 3/4 full of water melon mixture. Top with seltzer or club soda (stir to mix) and garnish with lime slices.
If you don't like lime flavors, then stick to 2 lemonades. If you think it might be a little too much lime for you, use 1/2 the lime concentrate. I enjoyed it just like this! The lime flavor can take over, but it was delicious.