Skip to product information
1 of 4

Flag of San Antonio, Texas - Color Changing Mug 11oz

Flag of San Antonio, Texas - 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 San Antonio, Texas - Color Morphing Mug Design

This design reproduces the official Flag of San Antonio, Texas, a clean heraldic emblem that puts the city's history on a single bold field.

Visual Elements & Composition

The flag is built from a vertical bicolor field, with blue on the hoist side and red on the fly side. Centred across the boundary sits a large white star, and inside that star is a black-outlined illustration of the Alamo. The star dominates the layout, and the Alamo's simple linework stands out crisply against the white. There is no lettering, only shape and colour, so the image reads at a glance.

Meaning & Symbolism

Each colour carries a meaning. Blue stands for loyalty, and red symbolises the blood of loyal Texans. The white star and the Alamo commemorate the historic fort and its role in the Texas Revolution, which is now part of the city's identity. William W. Herring designed the flag in 1933, it was unofficially adopted in 1935, and it was formally adopted in 1976. The current version, with the text removed, was adopted on August 27, 1992. The result is a Depression-era design that still carries the pride of San Antonio.

Turning the Story in Your Hand

A mug is held and turned, so the flag is seen in pieces as the cup moves, with the star and its Alamo drawing the eye first. The heat-reactive surface adds a second act: the design is only faintly visible when the mug is cold, and it reveals itself once a hot drink is poured in. The flag appears as the coffee or tea warms the cup, which suits a design so tied to a city's story of arrival and reveal.

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.