Meet the Grey Hat Hacker - Matte Black Magic Mug: a color-changing ceramic mug that turns your coffee into a little magic show. Perfect for tech lovers, coffee enthusiasts, or anyone who enjoys a dash of whimsy with their morning ritual. Key Features & Design Material: Ceramic Finish: Black matte finish when cold Reveal: Reveals the print when exposed to hot liquids Dimensions: height - 3.85" (9.8 cm), diameter - 3.35" (8.5 cm) Origin & Print: Made in China. Printed in the USA and EU It’s basically a tiny magic show for your desk: pour hot coffee and watch the design bloom before your eyes—no wand required, just hot liquid and a little surprise. 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. Gift-worthy, giggle-inducing, and proudly nerdy—this color-changing mug is a stylish addition to any caffeine-fueled routine. Add it to your collection or surprise a friend who appreciates smart humor and smart mugs.
