One Sweet lime and 2 cups of watermelon pieces will make one glass of juice. Juice the watermelon first and then juice the pieces of sweetlime.  A little water can be added in between.
The white layer around the sweetlime is full of antioxidants so don’t discard it conpletely.
Sugar can be eliminated or just add half a spoonful. A spoon of honey can be added and is optional.

I love the colour of watermelon.