Hampton Coffee Co. takes its name seriously. Owners Jason and Theresa Belkin want their coffee to be the coffee of the Hamptons. Their Water Mill headquarters is hard to miss, situated as it is on that particularly slow-moving stretch of Montauk Highway just east of Southampton's Princess Diner. But just in case you're not heading that far out, there's a Hampton Coffee outpost in Westhampton Beach.

And you needn't visit one of the two stores to try the coffee. Many East End groceries and supermarkets sell it, and it is served at dozens of local restaurants, including Starr Boggs in Westhampton Beach, Stone Creek Inn in East Quogue and Turtle Crossing and Rowdy Hall in East Hampton. If you wind up at Southampton Hospital, here's a consolation: The cafeteria and espresso bar recently switched from Seattle's Best to Hampton Coffee. (Among the Belkins' customers are the hospital's heads of food service and radiology, as well as a Southampton Town Council member.)

The company's newest outpost, launched in 2009, is a "mobile espresso unit." The custom-outfitted van is equipped to sell every drink the shop makes, Jason said. "Monday to Friday, it will go from Westhampton to Montauk and back, and on weekends, it will go to events -- fairs, runs, the Hampton Classic." How to pinpoint its exact whereabouts? "You can follow it on Twitter."

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Hampton Coffee isn't sold just in the Hamptons; that's where it is roasted. The Water Mill store not only houses a coffee bar and a sit-down cafe, but the "factory" where roastmaster Dwight Amade supervises the roasting and packaging of about 3,000 pounds of beans a week.

For now, that's enough -- but if the mobile espresso unit becomes a mobile espresso fleet, who knows?

--Compiled by Erica Marcus