Lefty's Blue Terra Cotta Left-handed Dribble Mug Left-handed mug will dribble liquids through a small hole if used in a right-handed manner. Imprinted with Lefty's logo on the front and warning on the back, "Use of this mug in a right-handed manner could be hazardous to your clothes." Mug size is 17 oz., but it holds less due to the dribble hole.