I forgot…when I made it, I did use a filter on the hops, so it might want to buy some empty tea bags and steep it overnight. Hop varieties can vary quite a bit in flavor, so check out the uses/descriptions online and look for ones intended to be flavor/aroma hops. It should be fun experimenting with the different types and even different combinations.
I am not sure what Lagunitas uses in their hop water…it might just be a hop extract as I don’t think it tastes much like real hops. Your home made version will be quite different.
Another fun thing to do with carbonated water is to try it with soda extracts or even different flavors of candy/baking extracts. I stopped drinking soda/pop/coke a long time ago since I did not want the sugar or artificial sweeteners, but you make a nice seltzer style cream soda or root beer or really just about anything you can think of. It will take a little bit of getting used to it, just like going from a sprite to a lemon lime sparkling water, but not much of a leap if you are already there with the other flavors of sparkling water.