Definitely pretty good, though I think the weight loss happening up front and without context sort of weakens it. I think some lead in with the woman talking about how she was working out and trying weight loss beforehand would have been a good set up. Where in a bit of comedy she talks about how she is trying a new weight loss idea and she has already lost 10 pounds or something along those lines, then as the guy drinks the beer she gets more sultry and the amount of weight lost inexplicably increases to 30, 50, etc between drinks until she is finally slimmed to Missa's real proportions.
I would love to see on screen process, which could be done with deflating balloons (or inflating them and reversing the footage) or even some of the morph effects we saw in other videos.
I love how it is an homage to this commercial: