Juice 2 limes and 2 lemons and separate the pulp. I used the Kuvings Auto 10 Plus juicer for the extraction but you can use whichever method you prefer. Now, add agave to the lemon lime juice and stir to combine.
Grab a glass and fill it about 1/7 of the way into the glass regardless of the size of the cup. Now, fill the rest in with sparkling/carbonated water. Add ice if preferred and enjoy!