Grumpometer – Color Changing Mug (11oz)

Some writers are a little cranky before they’ve enjoyed their first hot drink of the day. The Grumpometer – Color Changing Mug (11oz) is the perfect way to let people know when it’s safe to approach.

Just add hot water and watch it change color right before your eyes! The design on the heat-reactive surface reveals itself once the mug gets warm. The ceramic cup will go back to its original black outside and white inside when it cools down. The C-shaped handle helps keep a sturdy grip. It comes in one size – 11oz (0.33l) – plenty for that big morning cup of coffee.

HAND-WASH ONLY

Microwave safe

.: One size: 11oz (0.33 l)
.: Ceramic material with black exterior and white interior
.: Heat-reactive design
.: C-shaped handle
.: Glossy finish
.: NB! Hand wash recommended