Been watching all of these as you've been posting them, don't think I've commented yet though. I think this one is the best so far, the water animation is damn near perfect, in my opinion. I mean, sure it's "rough" as far as the line work goes, but given that you only had an hour, I think the fluidity of it is fantastic. What really irks me about this though is how you chose to reveal the inside of the cup. It's only one frame between seeing the side of the cup to seeing inside the cup. I think it would have been way better to change the opacity of the front layer gradually instead of all at once. The only other thing is the end of the water stream looks kind of weird to me in how it's essentially a rectangle. I feel like it should be either rounded or pointed, not exactly sure which. Anyway, this one turned out really well, so good job!