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MWSS 471 (USMC) Color Changing Coffee Mug

MWSS 471 (USMC) Color Changing Coffee Mug

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
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MWSS 471 (USMC) The acronym MWSS 471 refers to a Military Occupational Specialty (MOS) in the United States Marine Corps (USMC). This specific MOS stands for Mobile Water Supply Systems Operator and is categorized under Combat Service Support MOS. MWSS 471 Marines are primarily responsible for operating, maintaining, and overseeing water distribution systems during both peacetime and combat operations. These systems include wells, pumps, tanks, trucks, and purification equipment used to provide potable water supplies for the USMC forces. Additionally, MWSS 471 Marines may be tasked with performing minor repairs on watercraft utilities, maintaining supply points, and supervising water conservation efforts in the field. They also play a crucial role in ensuring the safety of their fellow service members by testing and treating water for contaminants before distribution. It is important to note that MWSS 471 Marines must possess skills such as mechanical aptitude, problem-solving abilities, and the ability to work effectively under pressure. They also require strong physical fitness levels due to the demanding nature of their duties. MWSS 471 is a critical MOS within the USMC, ensuring that troops have access to clean drinking water at all times, which is essential for survival and mission readiness.
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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.