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Flag of Duesseldorf Germany - Color Changing Coffee Mug

Flag of Duesseldorf Germany - Color Changing Coffee Mug

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
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The Flag of Duesseldorf Germany - Color Changing Mug is a unique drinkware piece that combines everyday utility with a nod to the rich cultural heritage of Duesseldorf, a city renowned for its historic significance in Germany. This 11oz mug showcases the vibrant and symbolic colors of Duesseldorf's flag, creating an eye-catching design that is sure to ignite conversations among coffee lovers and history enthusiasts alike. As you fill this color changing mug with your favorite hot beverage, the flag's colors gradually transform, adding a touch of magic to your morning routine or afternoon break. This innovative feature makes it a captivating addition to any kitchen or office collection, perfect for anyone who appreciates unique and cool drinkware.

Whether you are a proud Duesseldorf native or simply fascinated by German history and culture, this mug serves as an excellent conversation starter and a tasteful representation of your appreciation for the city's heritage. Its combination of practicality and aesthetics makes it a versatile gift for fellow aficionados, friends, or family members who share your love for Duesseldorf.

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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.