This cup holder was my first foray into the 3D design/printing world. It was designed for use with everything from coffee cups to water bottles.
If you mainly use larger water bottles or insulated cups and want something that holds them more snugly, please look at my other cup holder design with an open bottom.
I have also designed supports for attaching to a variety of wheelchairs
Cup holder support for standard tube armrest
Cup holder support for Permobil
Cup holder support for under cushion