Espresso tonic.

I haven’t had the chance to try one of these, but a colleague did and liked it. “The combination of espresso and tonic water originated in Sweden in the early aughts, allegedly created by a barista at Koppi Roasters in 2007. It grew in popularity throughout Scandavia [sic], and eventually made its way abroad through barista competitions, like the World Barista Championship.” ~ learn more