I used to use these in my M5 because BMW's would always break. I'm not afiliated, just thought I'd pass on info since they worked well for Water Bottles.

However, I am not sure if they would impeed into the footwell area, so much that it would be annoying, or even if it would touch ones leg.

Please advise. See them >>here<<

Mods please move to other location if not appropriate

 

Work great for taller drinks like water bottles and fast food medium sized drinks. I don't use it for the coffee cups you get at Starbucks and the like as they are usually too short to allow removal any other way than grabbing the pressed on lid which can lead to a big mess. Might not be an issue with the largest sized cup. Mine is on the passenger side of the tunnel and easy to reach even with my 33" arms. Doesn't interfer with the driver or the passenger that way.The attachment method doesn't really allow for an overly tight fit due to design of the tunnel itself but I've had no issues with mine coming loose or spilling any drinks whle driving since installing it some years ago.