Fuel your inner physicist and your caffeine addiction with our E=mc² Coffee Equation Enamel Metal Phone Sticker With 3M Sticky Backing — a clever, monochrome accessory that reimagines Einstein’s iconic formula as the ultimate morning truth: Energy = milk × coffee². Crafted from premium metal with crisp black-and-white enamel, this design blends science humour with bold typographic style for a clean, witty finish.

Built with strong 3M adhesive backing, the sticker stays firmly in place without damaging your device, giving you the polished look of an enamel pin without any punctures. Its compact, horizontal layout makes it perfect for customising iPhones, Android cases, laptops, tablets, lab notebooks, water bottles and more.

Whether you’re a science teacher, a STEM lover, a coffee devotee, or someone who believes caffeine is a fundamental force of nature, this enamel metal sticker adds personality, nerdy charm and everyday durability to your essentials.

Features:

• Premium metal with glossy soft enamel finish

• Humorous rework of E=mc² into the coffee-powered equation: Energy = milk × coffee²

• Strong 3M sticky backing — no pins, no holes

• Scratch-resistant and long-lasting

• Perfect for phone cases, laptops, water bottles and accessories

• An ideal gift for fans of physics jokes, STEM humour, caffeine addicts and science teachers