Carry one of the most iconic formulas in history with this Einstein-inspired E=mc² keychain.
Compact, eye-catching, and perfect for science lovers, this 3D printable model is a fun accessory for everyday use or a unique gift for students, teachers, and geek culture fans.

Its bold design makes the formula stand out clearly, while the small size makes it practical, lightweight, and easy to print. A great little project that combines science, style, and personality.

Ideal for:

• everyday key use,
• science-themed gifts,
• students and teachers,
• desk accessories,
• geek and nerd collections.