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Flag of Sagamihara Kanagawa Japan - Color Changing Mug 11oz

Flag of Sagamihara Kanagawa Japan - Color Changing Mug 11oz

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
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Flag of Sagamihara, Kanagawa - Color Morphing Mug Design

This design reproduces the official flag of Sagamihara, a city in Kanagawa Prefecture, Japan, as a clean, direct graphic.

Visual Elements & Composition

The flag is a single, uncluttered emblem. Its shapes are simple and bold, with no decorative border or background to compete with the central mark. Because the flag is a formal municipal design, every element sits where the official version places it, so the artwork reads as a faithful copy rather than an interpretation. Nothing is added for effect.

Meaning & Symbolism

Municipal flags like this one are the civic signature of a place. They carry the identity of a city's government and community into public life, flying over offices, schools and events. Vexillologists study them for their geometry and for what each motif is meant to say about local character. This flag belongs to that tradition: a recognised city emblem that stands for Sagamihara's administration and its residents, set within the wider story of Kanagawa Prefecture.

Made for a Mug That Changes

A mug is held in both hands and turned slowly as you drink, so the design is seen from every angle. This one has a particular trick. The flag sits faintly visible while the cup is cold, then comes into full view once a hot drink goes in. That gradual reveal suits an emblem whose whole purpose is to be recognised, and it makes a cheeky gift for someone with a personal link to Sagamihara, who will spot the flag the moment the coffee arrives.

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.