Skip to product information
1 of 5

Flag of Shiga Prefecture Japan - Color Changing Mug 11oz

Flag of Shiga Prefecture Japan - 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 Shiga Prefecture (Japan) - Color Morphing Mug Design

This is the official flag of Shiga Prefecture, a winged circular emblem built around a white, stylized katakana character set on a clear light blue field.

Visual Elements & Composition

Light blue fills most of the design, roughly four fifths of its surface, with crisp white forming the emblem. The white katakana character sits near the centre, shaped into simple, flowing strokes. Around it, the circle and the wing-like extensions give the layout a balanced, symmetrical outline. The style is flat and vector-clean, with no shading or texture, so every edge stays sharp. The palette is restrained, and the overall effect is calm and orderly.

Meaning & Symbolism

The circular form represents Lake Biwa (Biwako), the largest lake in Japan, which lies at the heart of the prefecture and shapes its identity. The wing-like extensions stand for harmony and progress. The emblem was announced on May 3, 1957, and officially adopted on September 16, 1968, so it is a modern piece of civic design. It works as a geometric shorthand for a place defined by its deep relationship with its natural surroundings.

Turning the Emblem in Your Hands

A mug is turned in the hand, so the flag reveals itself one section at a time as you rotate it, with the circle and wings moving across the curve of the cup. The design is faint when the mug is cold and comes into focus once a hot drink goes in, so the emblem appears as the morning coffee warms up. It makes a thoughtful gift for anyone with a link to Shiga, or anyone who simply likes a clean, well-made emblem at their first cup of the day.

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.