2.75x5-1/8" tall two-sided tumbler. One side has image of flag w/fishbone image and "Seuss Navy" written below. In waves below text is a buoy w/small flag reading "Esso" on it. Other side has long-legged, long-necked Dr. Seuss character w/text "Official When-Hen" in red letters and "When!" in blue letters to right of opened mouth bird. On waves from bottom to top are divisions designated by "Low Tide/One Jigger Tide/Two Jigger Tide/Three Jigger Tide." One tiny air bubble in side glass above "S" in "Seuss." Glossy finish. 1960s. Exc.