Geek out and perk up with the Energy = More Coffee² Tee—a clever twist on Einstein’s formula that every coffee lover, science fan, or witty teacher will appreciate. Featuring a hand-drawn Einstein sipping a steaming cup marked E = mc², this shirt blends nerd humor with vintage café vibes for a look that’s as sharp as your morning brew. Comfortable, versatile, and perfect for work, class, study sessions, or weekends at the coffee shop, it’s an easy conversation starter for anyone who believes real energy comes from a refill. Show off your brainy side and your caffeine devotion all at once!