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Flag of Koblenz Germany - Color Changing Mug 11oz

Flag of Koblenz Germany - Color Changing Mug 11oz

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
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Koblenz, Germany: A Design Brewed with History

Start your day with a sip of history! This unique color-changing coffee mug showcases the official flag of Koblenz, Germany, transformed into an engaging artwork that comes alive with heat.

The Armorial Flag Unveiled

The design faithfully replicates the armorial flag of Koblenz. At its heart lies a striking white field, providing a clean canvas for the city's heraldic heritage.

A Cross of Trier & a Crown of Mary

Dominating the center is a bold red cross, borrowed from the arms of the Archbishopric of Trier, a historical touchstone intricately connected to Koblenz’s past. Overlaid on the cross, you'll find a radiant gold (yellow) Marian crown. This crown represents Mary, the patron saint of Koblenz, adding a symbol of faith and civic pride.

A Flag in Motion

The mug design brilliantly captures the essence of a common German municipal flag, known as an armorial flag. It presents the city's coat of arms in a flag format. As the mug heats up, watch as the colors and details of this historical design subtly shift, giving you a daily reminder of Koblenz's enduring legacy.

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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.