Oral-B toothbrush head holder for 6

Simply cloned the model a bunch of times and merged the bodies. Also added holes letters of another colour directly from the slicer and printed them separately. 

I also uploaded the one with my custom letters as an example, keep in mind the tolerances.

Bonus tip: if you use a strong enough double sided tape you can insert and remove the heads with one hand (pushing the toothbrush directly in the head)