We just came back from Cincinnatti from a vacation and found it hysterical......my wife was not allowed to 'carry' the (tiniest) little bottle of purell onto the plane when it is attached to her purse. But it is perfectly fine if she places it into a quart ziplock bag and it gets x-rayed. So removing in from of the agent and putting it into the bag is fine.....but she can't just place it in a bin.......has to be in a bag......I'd say 'go figure' but in dealing with the TSA (Terminally Stupid Agency) it wouldn't mean much. My 7 year old son (his first flight) found it stupid.....and he didn't need us to tell him he figured it out on his own.