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Assistant Engineers at Headquarters Army of Potomac, November, 1864 (U.S. Civil War) Color Changing Mug 11oz

Assistant Engineers at Headquarters Army of Potomac, November, 1864 (U.S. Civil War) Color Changing Mug 11oz

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Regular price $17.99 USD
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Assistant Engineers at Headquarters, Army of the Potomac, November 1864 - Color Changing Coffee Mug Design

This dynamic mug design offers a visual journey into the world of the Assistant Engineers serving with the Army of the Potomac during the crucial November of 1864, a pivotal time in the Siege of Petersburg. The artwork transforms before your eyes, revealing a hidden dimension to the historical narrative.

The Transformation

Initially, the mug displays a subtle, subdued scene, hinting at the meticulous planning and tireless work undertaken by the engineers. The design incorporates period-accurate military insignia and engineering symbols, setting the scene for an intellectual and military pursuit. The initial presentation evokes the quiet determination and dedication to detail that defined the engineer corps during the Siege. This reflects the reality that the engineers worked outside the front lines.

The Revealing of Details

As the mug is filled with a hot beverage, the artwork dramatically changes. The vibrant colors of the uniforms begin to appear. The artwork unveils a detailed group portrait of the Assistant Engineers at Headquarters. Surveying instruments, maps, and engineering tools become visible, signifying the technical expertise and logistical prowess these officers brought to bear. This color-revealing effect underscores the crucial, behind-the-scenes role the engineers played in supporting the Union Army's operational effectiveness.

Symbolism and Meaning

The color-changing element itself symbolizes the layers of history and the hidden contributions that often remain unseen. The mugs design serves as a tribute to these unsung heroes, whose expertise played a pivotal role in shaping the outcome of the war. It's a reminder that victory is often secured not just on the battlefield but also through precise planning, strategic engineering, and unwavering dedication.

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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.