I'm new into 3D design, so i started to see what i need in the house to find projects so this is another thing that i figured i need. A bit of time spent in Fusion 360 and i came up with this idea since i didn't want to glue anything on in.
All you have to do is print the top part and a tray, they slide in easy and you can add 3 trays per side, currently i'm using it on one side and it stays really good.
Print the tray laying down, and the top standing up.
Have a nice day!