Vintage stoneware Hires Root Beer Mug with the outlined Hires (only) logo on the side opposite the hand-applied handle. Marked on the bottom: “USE AS CONTAINER EXCEPT FOR HIRES IS ILLEGAL” Stands about 6 inches high.
This one has two not horrible hair lines at the top as shown in the photos. The lighter one does not go all the way through. The darker one is associated with the top of the handle. It's not uncommon to find one there on this one of these mugs.
I've had a lot of these over the years and they always seem to have hairlines so I just keep buying them. There is some crazing. Also very normal.