Skip to product information
1 of 4

USCG MSO San Francisco Bay (U.S. Coast Guard) Color Changing Coffee Mug

USCG MSO San Francisco Bay (U.S. Coast Guard) Color Changing Coffee Mug

100 in stock

Regular price $17.99 USD
Regular price Sale price $17.99 USD
Sale Sold out
Shipping calculated at checkout.
The USCG MSO San Francisco Bay refers to a Marine Safety Office (MSO) operated by the United States Coast Guard (USCG). This office is strategically located within the San Francisco Bay area, serving as a vital component of the coast guard's operations in this region. The primary roles of an MSO include ensuring the safety and security of waterways, enforcing marine safety regulations, and providing various services to promote maritime commerce and recreation. The USCG MSO San Francisco Bay is responsible for overseeing a vast area that includes not only the iconic San Francisco Bay but also significant portions of California's Central Coast and the Pacific Ocean. This office works closely with other local, state, and federal agencies to maintain a safe and secure maritime environment. In addition to its safety and regulatory functions, the USCG MSO San Francisco Bay also offers services such as vessel inspections, marine casualty investigations, search and rescue coordination, and pollution response efforts. These services help to protect life, property, and the environment within the jurisdiction of the office. The USCG MSO San Francisco Bay is a testament to the Coast Guard's commitment to maritime safety, security, and stewardship in one of the busiest and most iconic waterways of the United States.
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.