You could put them in an attractive storage box on a shelf... and depending on the material, you might even be able to cut holes in the back to stick the charging cords through.
I'd like to know this as well. My electric tooth brush is the only thing I have besides hand soap on my counter in the bathroom.
What a bout putting them in a vase that matches your décor.
Place it on the top shelf of your medicine cabinet, where it should not be in anyone else's sight line.
You could try a decorative basket, either on a shelf or from a hanger to the wall or ceiling.