What do you do with your bar of soap when it has dwindled down?

I use soap bars as opposed to liquid handwash. Now, every month or so I will find myself wanting to throw away the bar of soap when it has been used to the point that it is not that easy to use due to its reduced size. Of course there is still a fair bit of soap left but just the fact that it is so thin and difficult to grip in your hand makes me want to open up a fresh bar. I hate wasting (yes even a little bit of soap) so I havn’t thrown them away and don’t use them either.

I want to know what you guys do with your soap bars when they’re that size? Do you chuck ‘em?