Rodolfo Padilla is known for this specific style of mug. It's an unusual design with a round shape but one side is flat. On all 3 rounded sides there is a different piece of fruit artwork.
The handle is also unique in that it is rectangular and quite large.
Features Rodolfo Padilla's signature on the bottom of the mug.
Condition note: the grapes are very light in color. I can't tell if this is due to fading or if it was originally painted this way. Please see the 1st photo for a good look.