Question: How do you easily use icing to decorate a cake?

  Options: 
 A. Thoroughly clean a caulking canister, and fill with icing so you can decorate with precision. Push down on one side to have it come out of the nozzle.
 B. Pour the icing into a large zip lock bag, cut off a small corner of the bag, then squish the icing into that corner so only a bit comes out at once.
Answer: B