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Flag of Rio Grande do Sul Brazil - Color Changing Coffee Mug

Flag of Rio Grande do Sul Brazil - Color Changing Coffee Mug

Regular price $19.99 USD
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Experience a touch of Brazilian culture with every sip from this Flag of Rio Grande do Sul Coffee Mug. This unique color-changing drinkware showcases the official flag of the Brazilian state, Rio Grande do Sul. The mug's design subtly changes color when filled with hot beverages, replicating the gradual transition of sunsets over the rolling hills of the region. It makes a thoughtful gift for anyone who cherishes South American history or appreciates unique and cool drinkware.

The vibrant colors and intricate patterns found on the flag are beautifully rendered onto this ceramic mug, making it an eye-catching addition to any kitchen or office. Its glaze ensures durability, while the handle promises a pleasant drinking experience. Whether you're savoring a cup of coffee in the morning or enjoying a warm beverage during a cozy evening, this Flag of Rio Grande do Sul mug will remind you of the rich history and stunning landscapes of Brazil's southernmost state.

Perfect for anyone who appreciates unique and cool drinkware.

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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.