I designed this as a cup holder for the back of a car seat headrest. Since I'm disabled and sit in my wheelchair in the middle of the car, I don't have access to the main cup holders in the car. 

This prints easily without supports. Brackets have had the corners rounded since this picture was taken.

Made to fit a large fountain drink.

I do recommend printing it in something with a higher melting temp than PLA though. . . I found that out the hard way one summer when the car sat outside and it melted itself off the headrest.

Included a version with a hole in the front for possible small Kleenex box. (Might need some support for top of the hole.

Updated photos to match current design.