Bromo-Seltzer Cobalt Blue Bottle Value Guide

The Bromo-Seltzer cobalt blue bottle is a staple of American apothecary history, manufactured by the Maryland Glass Corporation between 1920 and 1940. These cylindrical vessels are prized by collectors for their deep, rich pigment, which was specifically commissioned by inventor Isaac E. Emerson to make his antacid brand instantly recognizable.

What affects the value of Bromo-Seltzer Cobalt Blue Bottle?

• Condition of the original rusted metal tin cap, which is often missing or heavily corroded.
• Clarity and depth of the cobalt blue color, as sun-damaged or 'sick' glass can decrease value.
• Presence of original paper labels, which significantly increases the standard $12-$14 valuation.
• Structural integrity, specifically the absence of 'flea bites' or chips along the threaded rim.

How to Identify Bromo-Seltzer Cobalt Blue Bottle?

• Look for the distinct cylindrical shape made of deep cobalt blue glass rather than lighter cornflower shades.
• Check the base for the 'M' in a circle hallmark, signifying production by the Maryland Glass Corporation.
• Verify the presence of a threaded neck designed for the original tin screw cap common in the 1920-1940 era.
• Ensure the glass features the embossed 'Bromo-Seltzer' and 'Emerson Drug Co.' lettering on the side or base.

History of Bromo-Seltzer Cobalt Blue Bottle

Bromo-Seltzer was an antacid and pain reliever invented by Isaac E. Emerson in 1888. These iconic cobalt blue bottles were manufactured by the Maryland Glass Corporation, which Emerson founded specifically to produce the distinctive blue glass for his product. The brand became a household name in the early 20th century, and the bottles are now highly sought after by glass collectors for their deep, rich color.