At the heart of every US Navy Chief’s workspace, alongside the anchors, challenge coins, and well-worn khakis, sits a coffee mug that tells a story of dedication, sacrifice, and tradition. Unlike any other mug in the fleet, this one carries a unique distinction—it is never washed. This might seem strange to outsiders, but to those who have earned the title of Chief Petty Officer, the dark-stained interior of a coffee mug is a badge of honor, a visible testament to years of hard work and experience.
A Symbol of Seniority and Experience

The tradition of the never-washed coffee mug has been passed down through generations of Chiefs in the US Navy. It is more than just a superstition or a habit—it is a mark of tenure. The darker the inside of the mug, the more seasoned the Chief. Those deep brown stains, layered over countless cups of strong coffee, are not just remnants of caffeine; they are reminders of long nights, early mornings, and the never-ending cycle of duty.
A Chief’s coffee mug is not just a vessel for coffee—it’s a symbol of leadership. Junior sailors recognize it as an unwritten sign of seniority. A spotless, fresh-out-of-the-box mug is a clear giveaway of a new Chief still earning their stripes, while a deeply stained, well-worn mug signals a leader who has spent years guiding and mentoring those under their charge.
Fueling the Navy's Backbone
Chiefs are often called the backbone of the Navy, the link between enlisted sailors and commissioned officers. Their role requires them to be available at all hours, ready to solve problems, provide guidance, and ensure that operations run smoothly. The never-washed mug is a reflection of their non-stop dedication. There’s no time for dish soap when there’s always another issue to tackle, another sailor to mentor, and another mission to complete.
The tradition also carries an element of practicality. Some Chiefs argue that the built-up coffee residue adds a unique flavor, much like a well-seasoned cast iron skillet. Others say that washing the mug would strip away the hard-earned character it has developed over time. Whatever the reason, one thing is certain—if you see a Chief’s mug sitting on a desk, you don’t touch it, and you certainly don’t wash it.
Keeping the Tradition Alive at the Galveston Naval Museum

At the Galveston Naval Museum, where the legacies of submariners and naval heroes are preserved, this tradition is honored and celebrated. Visitors can step aboard historic vessels like the USS Cavalla (SS-244) submarine and USS Stewart (DE-238) destroyer escort, gaining insight into the daily lives of those who served during World War II. Among the artifacts and memorabilia, the well-loved, stained coffee mugs of Chiefs serve as a quiet but powerful reminder of their unyielding dedication.
At the Galveston Naval Museum, restoration and remembrance are on-going. The recently opened exhibit of the Chief Petty Officers' Quarters on the USS Stewart (DE-238) wouldn't be complete without a large coffee urn. Chiefs' uniforms include a Chief's coffee mug, signaling the importance of the coffee mug, as if the uniform wouldn't be complete without it.

To keep these mugs full, the museum’s gift shop proudly sells Rig for Red Coffee, a bold and robust brew fit for the most seasoned sailors. Whether you’re a veteran continuing the tradition or a visitor looking to take home a piece of naval culture, a cup of Red for Red Coffee is the perfect way to honor the legacy of the US Navy Chief.
So, next time you see a Chief’s coffee mug, resist the urge to wash it. Instead, respect the history it holds, the long hours it represents, and the unwavering commitment of the Chief who drinks from it. After all, some traditions are best left untouched—just like a Chief’s coffee mug.
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