Sales in the milk category (as measured by dollars) were on the rise in 2011, up 6.7% in the 52 weeks ended Nov. 27, 2011. Unit sales, on the other hand were off 2.7%, according to Chicago-based SymphonyIRI Group. The category includes five segments: whole milk, skim/lowfat milk, flavored milk/eggnog/buttermilk, milkshakes/non-dairy drinks and kefir/milk substitutes/soymilk.