Umbrella holder for Senz XL

I felt the need for an umbrella holder for my Senz XL Storm proof umbrella, so why not just draw one myself?

The holder consists of two seperate parts and both can be screwed onto a wall or any other place you'd like to keep your umbrella. I made the screwholes with a diameter of 3mm but had to drill it out a tiny bit to get the screws slide in well enough. Both have two countersunk screwholes.

Update:
Added a 2nd iteration of the cup, the 1st one broke because something fell on it