Holder/stand for Oral-B electric toothbrush heads. Instructions Print it. Fill the hollow base with something heavy, and seal the hole. I made this a standing version of my older thing (see the link above). I also strengthend the holder arms a little. I put a hollow base on, that is supposed to be filled with something heavy, so the toothbrush holder actually stands stably. The holes allow the water inside the brush to flow off.