Duraglas Half Pint Milk Bottle Value Guide

The Duraglas Half Pint Milk Bottle is a quintessential piece of mid-century Americana, manufactured by the Owens-Illinois Glass Company using their revolutionary 1940s strengthening process. These bottles are highly collectible because they represent a major technological shift toward lighter, more durable glassware capable of surviving high-temperature sterilization in the dairy industry.

What affects the value of Duraglas Half Pint Milk Bottle?

• Condition of the glass, specifically the absence of chips or heavy 'case wear' from industrial washing.
• Clarity of the embossed 'Duraglas' lettering and any specific dairy plant markings.
• Presence of original painted pyroglaze labels, which can increase value over plain embossed versions.
• The integrity of the reinforced rim, as these were prone to nicks during the capping and uncapping process.

How to Identify Duraglas Half Pint Milk Bottle?

• Look for the 'Duraglas' script logo embossed on the heel or base of the bottle.
• Verify the half-pint capacity, characterized by a compact round body and a reinforced rim designed for heavy reuse.
• Check for the Owens-Illinois Glass Company maker's mark, typically an 'I' inside a diamond and circle.
• Confirm the glass is clear and features the specific structural thickness associated with the 1940-1950 production era.

History of Duraglas Half Pint Milk Bottle

Manufactured by the Owens-Illinois Glass Company using the Duraglas process, which was introduced in 1940. This method provided a stronger, lighter, and more durable glass that could withstand the high-temperature sterilization and rigorous reuse required by the dairy industry during the mid-20th century.