Of course, everyone had recognised the cuff-hanger, but I would like to add one thing that has not been mentioned up to now: the hanger has a hook, and it can be used to add some weight (simply a basket with books or cans or bottles...)
Walking with that between your legs becomes uneasy, first due to the weight your sack have to bear, then because this extra load is moving between your legs and you hit it evry time you make a pace...
All that stuff is extremely cheap, and often available in hotel rooms... I remember using in a hotel in Brussels such a hanger, the plastic bag for laundry and the phone books that were provided i the room...