Until a few years ago, the only way to take home beer from your favorite non-packaging brewery was if it sold growlers — typically 64-ounce glass containers filled at the tap. But these vessels are too big and unwieldy, and they often leave beer flat after a day or two. More recently, breweries began offering smaller containers made of different materials, which helped. But last year, Oskar Blues revolutionized carryout beer with the Crowler machine. These allow bartenders to force oxygen out and then seal a 32-ounce can of any beer a brewery has on tap — and although they aren't reusable, Crowler cans are easier to carry and recyclable, and keep beer fresher longer. Oskar Blues has now sold hundreds of the machines to breweries all over the country; in the Denver area, you can find them at Cerebral, Lost Highway, Black Shirt, Dry Dock, Wonderland, Grist, and Great Divide's Barrel Bar, among others. Look for more soon.