You don’t have to add the sparkling water, but it brings a nice fizz to the drink, which I love!
You also don’t have to strain it, but the final product will be a little thicker and pulpier if you don’t. But if you want to save extra time, skip the strain!
If you are using a smaller blender for this (like a magic bullet), you will need to work in batches.
Find it online: https://www.thegarlicdiaries.com/watermelon-mint-refresher/