Add a touch of mystery to your coffee break! At first glance, this sleek 11oz (330ml) mug features a sophisticated black glossy finish. But as soon as you pour in your hot coffee or tea, the "magic" happens—the black coating fades away to reveal your stunning custom design underneath. It’s the perfect gift for birthdays, surprises, or adding a bit of wonder to your morning routine.

• Heat-Activated Technology: Watch your artwork appear instantly when exposed to hot liquids.

• Sleek Aesthetic: High-gloss black finish when cold, hiding your design for a true surprise.

• Capacity: Standard 330ml (11oz)—ideal for most European coffee machines.

• Care Instructions: To protect the heat-sensitive coating, this mug is Handwash Only and Not Microwave Safe.