SAFE AND SECURE CHECKOUT
Leave this coffee cup staff room. It's blank until somebody fills it with hot water, then the message appears:
"Since when does my job description include "LAB RAT?"" Who doesn't love a good surprise? This mug has a black matte finish when it's empty. But when it comes into contact with a hot beverage, the mug reveals a beautiful print that'll always make you smile when having your drink of choice.
• Height: 3.85″ (9.8 cm)
• Diameter: 3.35″ (8.5 cm)
• Black matte finish when cold
• Reveals the print when exposed to hot liquids
• NOT dishwasher or microwave safe
• Blank product sourced from China
Note that in some instances the coating might not be 100% opaque and an outline of the design might peek through a little. Also, you shouldn't put the mugs in a microwave or dishwasher since it can damage the coating.