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Flag of Hiroshima Prefecture Japan - Color Changing Mug 11oz

Flag of Hiroshima Prefecture Japan - Color Changing Mug 11oz

100 in stock

Regular price $17.99 USD
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Flag of Hiroshima Prefecture (Japan) - Color Morphing Mug Design

This is the official flag of Hiroshima Prefecture, Japan, reduced to a single white character on a bold crimson field.

Visual Elements & Composition

Crimson fills nearly the whole field, and the only other colour is white. The white mark is a stylized katakana character, ヒ, or "hi," which gives the flag its strong graphic shape. Overlapping circles sit within the composition and build the emblem's structure. Nothing else competes for attention, so the flag reads as clean, high-contrast, and immediate from across a room.

Meaning & Symbolism

The katakana "hi" anchors the prefecture's identity, while the overlapping circles stand for progress and continuous development. The emblem was adopted on July 23, 1966, and the flag followed on July 16, 1968. Together the two dates mark a deliberate, formal statement of regional pride, drawn from the prefecture's own symbolism rather than borrowed imagery.

On the Color Morphing Mug

A mug is a object you turn in your hands, so the flag gets seen from more than one angle as the coffee goes down. The design wraps the full curve of the cup, and its crimson and white hold their shape against the ceramic. The heat-reactive surface adds a second layer: the design is only faintly visible when the mug is cold, and it reveals itself once a hot drink is poured in. A gift like this becomes a small reveal every morning, with the flag appearing as the first cup warms the surface.

Size

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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.