• Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz-11oz-Go Mug Yourself
  • Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz-Go Mug Yourself
  • Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz-Go Mug Yourself
  • Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz-Go Mug Yourself
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Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz

Washington Navy Yard, D.C. David E. Herold, a Conspirator (U.S. Civil War) Color Changing Coffee Mug 11oz

100 in stock

$19.99 USD
$19.99 USD
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The Washington Navy Yard refers to a U.S. Naval base located in Washington, D.C., which played significant roles throughout American history, including during the U.S. Civil War. Among its historical figures connected to the site is David E. Herold, a conspirator associated with the assassination of President Abraham Lincoln. David Edmondt Herold (1836-1865) was born in Washington, D.C., and worked as a clerk at the Navy Yard before joining the Confederate Army during the U.S. Civil War. After the war ended, he became involved with John Wilkes Booth, the man who assassinated Lincoln. Following Booth's assassination of Lincoln on April 14, 1865, Herold served as a courier for the fugitive conspirators, providing them with information and supplies. On April 26, 1865, Herold was captured at the Port Tobacco River in Maryland while attempting to cross into Virginia. He was then taken to the Old Capitol Prison in Washington, D.C., before being transferred to Fort Jefferson in the Dry Tortugas. During his time as a prisoner, Herold maintained contact with fellow conspirator Mary Surratt, who had run a boarding house where some of the plotters had met. After the conclusion of the trial, which resulted in the execution of several conspirators, Herold was moved to the Washington Arsenal, located near the Navy Yard. On July 6, 1865, he committed suicide by swallowing sulfuric acid hidden inside a bottle of ink. His death followed the executions of Mary Surratt and four other conspirators on July 7, 1865, making him the only co-conspirator who avoided execution. The Washington Navy Yard continues to serve as an active U.S. naval installation and remains a significant historical site due to its connections with various events, such as the U.S. Civil War and the assassination of President Lincoln. The story of David E. Herold, one of the lesser-known conspirators involved in that tragic event, is an integral part of that history.
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Color-changing ceramic mugs with a glossy finish, black exterior, and white interior. Available in one size: 11 oz (≈330 ml). Heat-reactive coating reveals your custom design when filled with hot liquid. BPA- and lead-free, with a comfortable C-handle.

This mug brings a playful twist to the daily coffee or tea ritual. At room temperature, it looks like a simple black mug with a glossy finish. But add a hot beverage, and your chosen design fades into view, showing vivid colors against the white interior.

The ceramic body is durable enough for repeated use, while the C-shaped handle balances comfort and grip. Printing uses sublimation techniques that fuse color into the heat-reactive surface for crisp results when the design appears.

  • Material: ceramic with glossy black exterior and white interior.
  • Size: one standard size, 11 oz (≈330 ml).
  • Finish: glossy glaze with heat-sensitive surface.
  • Printing: sublimation process produces crisp, vibrant colors.
  • Safety: BPA-free and lead-free, suitable for everyday drinks.
  • Effect: design is faintly visible when cold, fully revealed when hot.

Perfect as a novelty gift or a fun personal mug, the heat-reactive design makes coffee breaks more engaging. It works well for morning coffee, afternoon tea, or hot chocolate.

  1. Daily routine: fill with any hot beverage to reveal your chosen artwork.
  2. Gifting: the “magic” reveal makes it a memorable present for birthdays, holidays, or office exchanges.
  3. Office use: sparks conversation while still being practical for everyday drinks.

Note: for best results, avoid designs that rely heavily on deep black backgrounds, as they may blend with the mug’s surface when cold.

Unlike standard mugs, color-changing mugs require gentler care to preserve the heat-reactive coating. Hand-wash only — avoid the dishwasher and abrasive scrubbers, which can damage the finish and reduce the effect.

The mug is safe for short microwave use when heating liquids, but repeated high-heat cycles may shorten the lifespan of the coating. Always allow the mug to cool before washing.

Available in one classic size: 11 oz (approximately 330 ml). It’s large enough for most standard coffee makers and fits comfortably in most cabinets.

Size guide

All measurements are product dimensions in inches.

11 oz
Height (in) 3.78
Diameter (in) 3.23
Diameter w/ handle (in) 4.76

Note: measurements are approximate; slight variations may occur due to manufacturing tolerances.