YIKES! Moldy tubby toys!

I always make sure that I squeeze out all of the water from the tub toys but the other night at the end of Alaina's bath I squeezed one of the toys out and ick! Black mold! For pete's sake, she chews on these things! I wanted to throw them away, but I called my mom and she said to wash them in bleach and water and squeeze them several times, then rinse them in plain water. So, I did it, but I am afraid to use them again. I mean, of course it's going to happen again. How often am I going to have to spend 40 minutes washing these things? It just doesn't seem worth it. BUT...my HUGE question is, why do they have a hole in them anyway???? What's the point? Can't they make them without a hole? Hmmm...off to Google hole-less tub toys!