Skip to product information
1 of 4

Flag of Belfast UK - Color Changing Mug 11oz

Flag of Belfast UK - Color Changing Mug 11oz

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
Sale Sold out
Shipping calculated at checkout.

Flag of Belfast - Color Morphing Mug 11oz Design

This design presents the official Flag of Belfast, a heraldic banner derived from the city's historic coat of arms.

Heraldic Layout & Visual Structure

The composition is set against a traditional heraldic color palette of blue, red, and silver. A central depiction of a silver sailing ship navigating blue waves dominates the banner. The upper portion features a triangle of vair, a stylized squirrel-fur pattern, alongside a red canton displaying a silver bell.

Civic Heritage & Symbolism

Formally granted on June 30, 1890, the emblem captures the civic identity and historical lineage of the Northern Irish city. The silver sailing ship highlights Belfast's maritime and shipbuilding heritage. The silver bell acts as a canting pun on the first syllable of the city's name, while the stylized squirrel-fur pattern references the arms of Sir Arthur Chichester, the founder of modern Belfast.

On the Color Morphing Mug 11oz

As this ceramic cup is turned in the hand, the heat-reactive surface shifts from a solid black exterior to reveal the full-color wraparound heraldic banner as your morning coffee warms the vessel.

Size

Bulk Discounts Available

These discounts apply to all products.

Buy 2
10% OFF
Buy 3+
20% OFF
Buy 5+
30% OFF
Buy 10+
40% OFF

Automatically applied at checkout.

View full details

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.