Forget the cider; those in the know really come to Cold Hollow Cider Mill (3600 Rte. 100, Waterbury Center, 800/327-7537, www.coldhollow.com , 8 a.m.–7 p.m. daily July–Oct.; 8 a.m.–6 p.m. Nov.–June) for the donuts, homemade gooey O’s that blow Krispy Kreme out of the water. Of course, you’ll need something to wash them down with, and that’s where the cider comes in. Cold Hollow is one of the leading producers of apple cider, which submits apples to a souring process to make a drink much tarter than just ordinary juice. Cold Hollow gives free samples of its cider, which is still made on an old-fashioned hydraulic cider press from the 1920s.