Late 1800's Penslar Detroit Cobalt Blue Bottle – Antique Barber Tonic

Late 1800's Penslar Detroit Cobalt Blue Bottle – Antique Barber Tonic

Produced in Detroit, Michigan during the late 19th and early 20th centuries, Penslar bottles are iconic examples of American barbershop and apothecary glass. These cobalt blue cork-top bottles were typically used to hold hair tonics, colognes, or liniments. The deep blue color helped protect light-sensitive formulas while adding a premium, eye-catching appeal for countertop display. Penslar was known for its emphasis on quality packaging—many bottles were embossed with elegant typography and were often reused in barbershops and general stores. Today, collectors prize these for their deep, vivid cobalt tone, crisp embossing, and period-correct form. Tumbled or professionally cleaned examples command the highest interest, especially those with complete labeling or embossed Detroit markings.