Vintage Dr. Pepper's Glass mug w/ Silver Handle ~ Phos Ferrates inscription

Vintage Dr. Pepper's Glass mug w/ Silver Handle ~ Promotional mug with Phos Ferrates inscription. Elegant glass featuring Dr. Pepper's logo with a silver holder. Perfect for collectors. Regards to an early formulation of the soft drink that contained iron phosphate. This ingredient was marketed as a tonic in the late 19th and early 20th centuries.