Who says physics can’t be funny (or caffeinated)? Our "E=mc²: Energy equals how much coffee I drink. Squared." mug is the perfect equation for anyone who runs on science and espresso. Einstein had relativity—we have reality: the more coffee you drink, the more energy you produce, and yes, it’s definitely exponential. This mug is ideal for students, engineers, overworked humans, and anyone who’s ever confused actual physics with their morning survival strategy. So fill it up, defy the laws of sleep, and let caffeine be your favorite constant. Science has never tasted so good. 
 
This sturdy mug is perfect for your morning coffee, afternoon tea, or whatever hot beverage you enjoy. It's glossy white and yields vivid prints that retain their quality when dish-washed and microwaved. Add a graphic of your choice and add this best-seller to your store, so others can enjoy your magical designs too!. Ceramic. 11 oz mug dimensions: 3. 8″ (9. 6 cm) in height, 3. 2″ (8. 2 cm) in diameter. 15 oz mug dimensions: 4. 7″ (11. 9 cm) in height, 3. 3″ (8. 5 cm) in diameter. 20 oz mug dimensions: 4. 3″ (10. 9 cm) in height, 3. 7″ (9. 3 cm) in diameter. Lead and BPA-free material. Dishwasher and microwave safe. Blank product sourced from China. Disclaimer: The White Glossy Mug may vary slightly in size by up to +/- 0. 1″ (2 mm) due to the nature of the production process. These variations are normal and won’t affect your mug’s quality or functionality. This product is made on demand. No minimums.