The Story Behind the BMW F30/F31 Cupholder Phone Holder A BMW enthusiast, was tired of his phone sliding around while driving. Windshield mounts looked cheap, and vent clips blocked airflow. So, he designed a phone holder that fits perfectly into the cupholder—no adhesives, no drilling, just a clean and secure fit. After multiple prototypes, he perfected the design. Now, every BMW F30/F31 owner can 3D print their own seamless phone holder. 🚗📱