I've chucked them in the past....but my mum managed to use some sort of glue to plug the holes....works a treat. She did it to two ducks and the glue has never come out/dislodged. Must find out what type of glue she used. Imagine it would have to be some sort of craft / builders glue. The only thing is they obviously won't make a 'squeak' noise anymore and the kids can't squirt water out of them which is sometimes fun to do.