George Tyrer’s Soda Font Liverpool

Hard to find early advertising cup for G. Tyrer’s improved Soda Font Liverpool. These cups were used as a modern day alka seltzer mixing water and crystals in each compartment. Two very faint hairlines only at the back handle area. Manufacturing stress line just above foot. Height 4.2 inches. Marked SEMI CHINA m to base. Semi China was marketed by Minton.C1840