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Flag of Rotterdam the second city of The Netherlands - Color Changing Coffee Mug

Flag of Rotterdam the second city of The Netherlands - Color Changing Coffee Mug

Regular price $19.99 USD
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Embodying the spirit of Rotterdam, the second city of The Netherlands, this Color Changing Coffee Mug is a unique tribute to its vibrant character. This mug features an intricate design of the iconic Flag of Rotterdam, beautifully recreated in a thermochromatic coating that changes color with the temperature of your drink. Ideal for coffee lovers who appreciate the charm of their city, this mug serves as a daily reminder of Rotterdam's resilience and vitality. Perfect for anyone who appreciates unique and cool drinkware.

Crafted with attention to detail, the Flag of Rotterdam design on this mug is not just a visual representation but a testament to the city's rich history and progressive spirit. The thermochromatic coating adds an interactive element, transforming the design as you sip your drink, making each cup a delightful experience. This mug makes a thoughtful gift for Rotterdam residents or anyone with an affinity for this bustling port city. Perfect for anyone who appreciates unique and cool drinkware.

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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.