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Flag of Worcester, Massachusetts - Color Changing Coffee Mug

Flag of Worcester, Massachusetts - Color Changing Coffee Mug

Regular price $19.99 USD
Regular price Sale price $19.99 USD
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The Flag of Worcester, Massachusetts - Color Changing Coffee Mug is a unique piece of drinkware that embodies the spirit of this historic city in Massachusetts. The design features the official flag of Worcester, which includes a gold shield divided into four quadrants, each representing one of the city's former towns: Cambridge, Shrewsbury, Hartford, and Leicester. This color-changing mug showcases the beauty and symbolism of the Worcester flag, with temperatures causing the design to transition between its daytime and nighttime versions. Ideal for locals, history enthusiasts, or anyone who appreciates unique and cool drinkware.

This mug is not just a functional coffee container but also serves as a conversation starter about Worcester's rich history. The design subtly showcases the city's coat of arms, which consists of a unicorn, a dragon, and a griffin, symbolizing strength, wisdom, and vigilance. Whether enjoyed at home or in a casual setting, this mug brings an element of local pride to any table. Perfect for anyone who appreciates unique and cool drinkware.

The Flag of Worcester, Massachusetts - Color Changing Coffee Mug is not only a fascinating piece of art but also a practical addition to your daily routine. Its color-changing property adds an element of surprise and fun, making every cup of coffee or tea more enjoyable. Whether you are a resident of Worcester, a history buff, or simply appreciate unique designs, this mug is the perfect choice for adding a touch of local charm to your day.

Incorporate this distinctive piece of drinkware into your collection and take pride in showcasing the beauty of Worcester's flag every time you enjoy a warm beverage. Share its unique story with others, fostering connections and conversations about the city's rich history and culture.

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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.