Panasonic Sonicare Charger Holder for Shelf

Between my electric toothbrush, my beard trimmer, and my electric razor, the bathroom sink countertop is a bit crowded. I'd like to move them up to a shelf, but I don't want to have trouble with the chargers shifting as I try to put the items into them, or take them out. Hence, this design. It fits the charger for my Panasonic Sonicare toothbrush snugly enough that I can screw the holder to a shelf, then snap the charger into it, and it won't move. There's a gap in the back for the power cable.