MugPlug
thingiverse
I'm furious with that mug, it's devouring the interdental brush whole! I had to whip up some sort of solution to save it from itself.
Download Model from thingiverse
With this file you will be able to print MugPlug with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on MugPlug.