This is a large mug with thumb rest advertising Bob's Red Mill Whole Grain Foods.
The mug is white with red lettering reading "Bob's Red Mill To Your Good Health Whole Grain Foods For Every Meal of The Day", and has Bob Moore's signature also in red.
The cup measures 3.5" tall, 6.75" long including the handle, and 4.75" in diameter.
It is in good pre-owned condition with some slight paint wear of the lettering.