We used to keep them in a cup in the bathroom, but Bee got something to hang them on... maybe because we saw this sign on the sidewalk recently:

Each toothbrush now has its own thing to hang on, and is covered nicely by a lid so that the toilet flushing can't get to it. Phew!!

Where do you keep your toothbrush(es)? Is it at least six feet away from the toilet?