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Flag of Cupertino, California - Color Changing Coffee Mug

Flag of Cupertino, California - Color Changing Coffee Mug

100 in stock

Regular price $19.99 USD
Regular price Sale price $19.99 USD
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This Color Changing Coffee Mug, inspired by the Flag of Cupertino, California, offers a unique fusion of local pride and everyday utility. The design showcases the flag's vibrant colors and iconic elements, such as the three Quicksilver mines symbolizing the city's mining heritage, against a backdrop that subtly changes with temperature. Sip your morning brew while commemorating Cupertino's rich history, making this mug an excellent choice for residents or admirers of Silicon Valley. Perfect for anyone who appreciates unique and cool drinkware.

The color-changing feature adds a touch of intrigue to each sip, transforming the mug into a mini art piece that beautifully captures the essence of Cupertino. With this mug in hand, you can proudly showcase your affection for this innovative city while enjoying your favorite beverage. Whether given as a gift or used daily, this color-changing coffee mug is sure to become a cherished item in any collection.

Note: The design on the mug may vary slightly depending on production processes. However, the essence of Cupertino's flag and its unique charm remain intact, making each mug a truly special piece.

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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.