Arc Flash Heat-Activated Mug (Color-Change)

Black when it's empty. Pour the coffee in and the arc flashes — the “ARC FLASH” warning fades up like a strike on cold steel.

Ceramic that does a magic trick before your first sip. “Contents Hotter Than My Last Bead.”

• Heat-activated color change
• Hand wash to keep the effect sharp
• Printed to order, ships in 3–5 days