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Pontoon Bridge (U.S. Civil War) Color Changing Coffee Mug 11oz

Pontoon Bridge (U.S. Civil War) Color Changing Coffee Mug 11oz

100 in stock

Regular price $19.99 USD
Regular price Sale price $19.99 USD
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The Pontoon Bridge refers to a temporary structure used during the U.S. Civil War for military transportation across rivers or bodies of water. Unlike traditional bridges, pontoon bridges are constructed using large floating platforms called pontoons that can be easily assembled and disassembled. This design enabled quick deployment and relocation, which was particularly valuable in the fast-paced battlefield conditions of the Civil War. These bridges were typically made from inflatable fabric or wooden barrels filled with sand or timber floats. The pontoons were connected by flooring or planking to create a stable walking surface for soldiers and supplies. Notable examples include the pontoon bridge built under the leadership of Union officer James B. Eads during the Vicksburg Campaign in 1863, and the bridges constructed by Confederate forces during the Siege of Petersburg in 1864-1865. Pontoon bridges played a crucial role in numerous Civil War battles, allowing armies to cross rivers without exposing themselves to enemy fire from the opposite bank. The design of these bridges demonstrates the ingenuity and adaptability of both Union and Confederate engineers in overcoming challenging terrain during the conflict.
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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.