MINNEAPOLIS (AP) — It's a bar that serves nothing but tap water.

The concept developed by two Minneapolis artists has been a hit at pop-ups across the country.

So, Colin Kloecker and Shanai Matteson are preparing to open a storefront Water Bar in northeast Minneapolis — a taproom serving city water plus limited-edition pours from other communities. A grand opening is planned for May.

Visitors will get to taste and compare, but the goal is bigger: They want to connect the public with scientists, experts and activists who will serve as bartenders.

They want the conversations to get people thinking about critical water issues facing their communities, the country and the world.

They won't serve pricey "artisanal water" as has been tried elsewhere — just free tap water.