This stylish holder is primarily designed for interdental brushes but you can use it for whatever you need. It has integrated slope and draining channels as well as place for non-slip pads (d=8mm). 

Printing:     

This is a really easy print without supports. You can use basically any parameters. There are 8,5 mm bridges but it should not be any problem for any printer.

If you want to have the holder dual color just pause it at 6 mm and change the filament.