Do they still sell hippo soda water?

"Hippo" soda water is not a common or widely recognized brand. It's possible that it was a local or regional brand that is no longer in production.

To help you find out more information, I need some additional context:

* Where did you see or hear about "Hippo" soda water? Was it in a specific location, or did you see it online?

* What year did you see or hear about it? This can help narrow down the search.

With more information, I can help you find out if it's still available or learn more about its history.