My wife asked me for a small bed shelf that she could hang on the the headboard or side of the bed. It needed space for phone and applewatch to be charged. I searched all sites, but could not find anyone exactly fitting her needs so I decided to try and make one myself and it came out pretty nice. The sliding/attaching slot is 28mm diameter. 

I decided to use tree supports for this since its printed as shown. Total print time was about 8 hours on my ender 3 s1 pro.