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Washington, D.C. Gen. William Hoffman, Commissary General of Prisoners (At Right) and Staff on Steps of Office, F. St. At 20Th Nw (U.S. Civil War) Color Changing Mug 11oz

Washington, D.C. Gen. William Hoffman, Commissary General of Prisoners (At Right) and Staff on Steps of Office, F. St. At 20Th Nw (U.S. Civil War) Color Changing Mug 11oz

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Washington, D.C. Gen. William Hoffman, Commissary General of Prisoners (At Right) and Staff on Steps of Office, F. St. At 20Th Nw (U.S. Civil War) Color Changing Mug 11oz

A formal group portrait of General William Hoffman and his staff, gathered on the steps of their Washington office at the corner of F Street and 20th Street Northwest.

Visual Elements & Composition

The building's steps form the stage, and the men spread across them read as one connected group rather than scattered individuals. Hoffman stands to the right, a placement that sets him apart without pushing anyone out of the frame. Nothing here is decorative. The architecture, the rows of staff and the settled stances all work together to show an organisation at rest in its own doorway.

Meaning & Symbolism

Hoffman served as Commissary General of Prisoners, the officer responsible for the men held during the American Civil War, and this photograph records the people who ran that work from the nation's capital. The hierarchy is visible in the arrangement: the general in his place, his staff around him, the office behind them. It is an archival document of military administration in mid-nineteenth-century Washington, the quieter side of the war, where records and prisoner management were as much a part of the story as the battlefield.

On the Color Morphing Mug

A mug is turned slowly in the hand, so the steps and faces come into view a little at a time, much like an archive giving up its secrets. The heat-reactive surface makes that reveal literal. The design sits faint while the mug is cold and rises as hot coffee goes in, as if the staff were stepping back into the light of their office. Pour something warm and the historical record appears; let it cool and it recedes again. It is a cheeky way to keep a piece of Civil War administration on your desk.

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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.