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  • Flag of San Luis Obispo, California - Color Changing Coffee Mug 11oz - Go Mug Yourself
  • Flag of San Luis Obispo, California - Color Changing Coffee Mug - Go Mug Yourself
  • Flag of San Luis Obispo, California - Color Changing Coffee Mug - Go Mug Yourself
  • Flag of San Luis Obispo, California - Color Changing Coffee Mug - Go Mug Yourself
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Flag of San Luis Obispo, California - Color Changing Mug 11oz

Flag of San Luis Obispo, California - Color Changing Mug 11oz

100 in stock

$17.99 USD
$17.99 USD
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Flag of San Luis Obispo, California - Color Morphing Mug, 11oz Design

This design reproduces the modern flag of San Luis Obispo, California, a clean, streamlined emblem built from a few carefully chosen symbols.

Visual Elements & Composition

The flag works in two colours, gold and blue, with no clutter. Gold fills one part of the field and blue fills the other, and they meet in a simple division that reads at a glance. At the centre sits a single icon, a mission bell, which anchors the whole layout. Nothing competes with it. The restraint is deliberate: this version was designed to be understood quickly, from a distance or up close.

Meaning & Symbolism

Each element carries a local meaning. The gold stands for the region's hills, the golden slopes that frame the city. The blue stands for the nearby sea, the Pacific coast that shapes the place. The mission bell commemorates Mission San Luis Obispo de Tolosa, founded in the eighteenth century and still central to the city's identity. The flag was adopted to replace an older design that relied on text, and the switch to pure symbol was a statement in itself: the community chose to speak through its landscape and heritage rather than through words.

Turning It in Your Hands

A mug is a object you handle, rotate and study while you drink, so the emblem reveals itself gradually as you turn it. The bell comes into view at the front, and the hills and sea wrap around the curve as you move the cup. The colour change adds a second layer: the design is only faintly visible until a hot drink is poured in, and then the flag appears, as if the emblem were rising out of the cold. It makes a cheeky, thoughtful gift for anyone with a connection to the Central Coast, or for anyone who simply appreciates a good piece of heraldry with their morning coffee.

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.