The Green Goddesss was served at Peli Peli, a now-closed South African fusion restaurant in Houston, Texas. It’s a fresh, floral, fizzy blend of kiwi, elderflower, lime, soda, and a botanical gin like Hendrick’s.
A flavored sparkling water will work fine as a topper, if you have a lime, cucumber, or similar flavor that you enjoy. The kiwi seeds don’t need to be strained out, but they do tend to get caught in the bubbles at the top of the drink; a straw is a nice compromise.