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TW PHW21a (Taiwan) (Road Sign) Color Changing Mug 11oz

TW PHW21a (Taiwan) (Road Sign) Color Changing Mug 11oz

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
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TW PHW21a (Taiwan) (Road Sign) Color Changing Mug 11oz

This design is a navy route shield carrying the number 21 and the kanji 甲, rendered as a flat, graphic road marker.

Visual Elements & Composition

Navy blue dominates the field, with white taking the remainder. A rounded triangular shield sits at the centre, and a thin white line traces an inner border just inside its edge. The numeral 21 fills the upper portion in bold form, and the kanji 甲 sits beneath it, smaller and set as a second line of information. Nothing else competes. There are no gradients, no shading and no decorative framing, only the shield, its border and two marks of text.

Meaning & Symbolism

The shield is the visual language of road signage. A route marker tells a driver which road they are on before any destination is read. The number 21 serves as the route designation, while 甲 is the first of the Heavenly Stems in the traditional Chinese sequence, a character associated with order and beginnings. Together they draw on the route-marking conventions of Taiwan, where numbered roads are identified by shield-shaped markers. The piece is modern in era and built for quick recognition at a glance.

Read Across the Curve

A mug is turned in the hand, so the shield is read in pieces: the number first as the cup is lifted, the kanji beneath it as the mug rotates, and the white border as it comes round again. The design is set to emerge as the mug warms, so the route marker appears gradually, which suits a sign meant to be found rather than stared at. It makes a fitting gift for someone who spends their days on the road, plans their own journeys, or has a favourite drive they never tire of talking about.

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.