This is a good approach to the challenge and I like the colors.

I think there's a misunderstading about whether these are lemons or limes. Limão translates to "lemon", but limão taiti translates to "lime", even though you apparently consider a lime to be a type of lemon. In English we'd call these "limes" though, and maybe call it "limeade" instead of "lemonade" : )

I understand why the ice cubes are at the bottom and the straw just disappears, but this piece may have been better if you designed it so those problems weren't so apparent.

Still, I like it--it's a nice piece.

 I love this so much I faved it right away. I agree with what everyone's said about the colors and negative space too--but I think his left shoulder (house right) is conspicuously lacking AA.

 I think detailing the background with more contrast and lighting/shadow would enhance the picture, but I really like the stylized monkies and the gruesome spin on this concept. Good job!

@Mis-BUG:  Thanks for the feedback. The initial sketch was really rough so I did have to do a lot of refinement to it. I'll probably be more careful about that step in the future. I added my references too.

 This is the first entry that made me go "Ewwww!" Nice job!