Not bad, but I'd agree with the first post. All the movement is a little bit floaty. I know keyframing is tedious work but it would probably be worth your while to try to snap up the pace of the animation. The movement is very nice, just needs a bit more energy.
Also, there seems to be a little bit of a snap when the constraints on the can/bottles are turned on and off. You might be able to smooth that up a little bit too.
Good work though, good luck and congratulations on your first job in maya. There is much fun to come.