Simple modification to this awesome model, big thanks to TheKre8Group.
Works just like the original print but with 3 balls. Not as comfortable to have it on your belt, but awesome to have it on your bag.
Added a version with a longer belt grip
Easy to print, I printed mine with bq orange filament at 205 C, no rafts or supports an with 25% infill (you can go higher if you want it to feel more solid, but shouldn't affect it's functionality.