This is my version 1 bottle cage tool strap mount, I designed this purely to hold my multi tool but you could use this for just about anything you can get a strap around, I would recommend rotating the part 20° on the x and y, I used normal supports.

4 walls 

30% infill tri hexagon

0.16 layer height

Auto supports

I used esun matte epla I find it has a good level of friction