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Yorktown, Va. Confederate Sandbag Fortifications (U.S. Civil War) Color Changing Coffee Mug 11oz

Yorktown, Va. Confederate Sandbag Fortifications (U.S. Civil War) Color Changing Coffee Mug 11oz

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Regular price $19.99 USD
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Yorktown, Va. Confederate Sandbag Fortifications (U.S. Civil War) The term refers to a series of sandbag fortifications constructed by the Confederate Army during the American Civil War at Yorktown, Virginia. These defenses were an essential part of the Confederacy's strategic position in the Siege of Yorktown (1862), a significant military engagement that took place from September 4 to October 4, 1862, during the early stages of the war. The sandbag fortifications, made by stacking bags filled with sand or earth, were used to reinforce and protect various Confederate positions in Yorktown. Notable among these fortifications is the "Confederate Line," which stretched from Wormley Creek to the Warwick River. These structures played a crucial role in the defense of Yorktown against Union forces led by General George B. McClellan, contributing to the ultimate outcome of the siege and the strategic advantage held by the Confederacy in the Virginia Peninsula Campaign. Today, remnants of these fortifications can be found and visited as part of the historical sites at the Yorktown Battlefield within the Colonial National Historical Park.
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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.