A casino chip and a white t-shirt that says My friend went to Las Vegas and all I got was this lousy t-shirt.
Also a note:
They didn't have any t-shirts that said "My fellow teammate in a horribly failed mission went to Las Vegas to get drunk and not deal with it and all I got was this lousy t-shirt." Which probably wouldn't have fit on a t-shirt anyways so friend works just as well.