Cut the watermelon into smaller pieces and transfer it into the blender
Add 1 pound of strawberries, 2 cups of water, and ½ cup of sugar to the blender
Blend the mixture
Strain the blended mixture into a pitcher
Add some small watermelon pieces and chopped strawberries to the pitcher
Add chewable nugget ice to the pitcher
Rim the cups with chamoy and chili powder
Fill the cups with ice and serve the agua fresca
