Nice. One thought... the greatest "oh that's neat" payoff for me was seeing a note that in some county, bottled water was widely available. And in another, not. Which prompted me to wonder which countries that was/wasn't true for, and how it relates to tap quality. But the UI didn't seem to make that easy to explore.

So perhaps pull more information up to the top level? At least on desktop?

One pattern of use is "exploring the world". On desktop, this might involve clicking once to get the little popup, with a side-effect of unpredictably zooming and panning the map; then clicking again to get an info page; and then back page to return to the map. For every country of interest.

I wonder if this could be made lighter weight? The country outline is nicely highlighted upon mouseover. One might imagine adding much of the info page core content, somewhat abbreviated, to a slightly larger popup. And even showing that popup upon mouseover (with perhaps a delay, or mouse velocity tracking for intent). So then one might simply mouse move around the world, seeing water quality, bottle availability, etc, and able to more easily spot "oh that's neat".