That would be Tom and Chloe Ann's suitcase. By the time we found this, they were almost home. Really, the funniest part of the story is the ironic conversation they had right before they left.
Tom: Did you do a final sweep to make sure we got everything?
Chloe Ann: (Sassy tone) Yes, and I even got the things you forgot.
Oh, ouch! You gotta hate it when being sassy comes back to get you!