Needed to store silicone tubes in my work van and not have it roll around or fall over while driving. Couldn't find anything on any of the 3D depositories that worked well enough. Also added holes at the back to hold spare nozzles.

Make sure you mount the brakets 2mm higher than the tubes to give it enough room to slide in. 

Print in PETG as in needs to flex when pushing them in.

Enjoy