I've seen some ideas for UMC holders for the garage and it strikes me that someone with a 3D printer could design and print a Cupholder to straddle the walls on the center front floor storage/yacht floor. Alas, I don't have a printer or the brain cells to figure one out. So, any of you tech savvy people tried this? Or found a Cupholder alternative that is simpler and far less expensive than the Tesla or EVAnnex CCI?