Corrected entry: Dale and Brennan receive their Chewbacca masks near the end of the movie while they are in their "treehouse boat. But earlier in the movie the two are having a conversation in their room and Dale is wearing the mask already.
moviebuff2011
3rd Jan 2012
Correction: Dale had kept his mask through the whole movie. When he moved out of his dad's house, it shows him in his own apartment one day doing his taxes while wearing the Chewbacca mask. If he had actually ended up giving it away when he moved out, and had his parents buy a new one for him at the end of the movie, I would think that they would have bought both Dale and Brennan the exact same mask, so that one brother wouldn't get jealous if other brothers mask was better quality. Brennan's is different and cheaper, and he actually says that "It's OK that mine isn't movie quality" (unlike Dale's) to everyone there.