The better ones will be relatively tall (but not too tall!
) and wide on the bottom to promote easy loading on the brush.
Genuine examples of these types of vintage mugs command the highest prices on internet auction sites.
Barber shops sold mugs with the owners’ names on them partly because they thought that shaving rash came from sharing the same soap.
Mugs purchased and held at barbershops were customized with the client’s name and often displayed to encourage the customer to return to the barbershop regularly.