Maybe it’s the heat, but coffee professionals who never put sugar in their espresso and believe milk is for cereal will loosen up when it comes to summer drinks. Here, in no particular order, are six iced coffees (actually, five iced coffees and one from a chilled keg) that are inventive, refreshing and delicious.

Black & Blue, Cuvée Coffee in Austin, Tex.

What a difference some bubbles make: This cold-brew coffee is nitrogenated and kegged so it flows out of a beer tap with the creamy body of a Guinness and the thick head of a stout. Sip it like a beer and savor the bittersweet chocolate notes. Cuvée Coffee will open its own shop this summer and hopes to introduce a canned version soon. Until then, the Black & Blue is available at a number of locations in the Austin area (the roaster sells more than 80 kegs a week) including Seventh Flag Coffee.

About $4, 2000 East Sixth Street (set to open at the end of July), Austin, Tex., 512-264-1479, cuveecoffee.com.

Kaffe Tonic, Saint Frank in San Francisco

A crisp and refreshing play on the bitter and sweet flavors found in both espresso and tonic water, the Kaffe Tonic is simply a shot of espresso poured over a glass of Fever-Tree tonic and ice. It tastes like a refined take on the Fernet-Branca and soda you drink in the afternoon in Buenos Aires. Inspired by a similar drink at Koppi, a microroaster in Helsingborg, Sweden, the name is a homage to its origin.