Well, I happened to bring a few skeins of worsted yarn that I wasn't really using for anything, and since a soap cozy has been on my project list for quite some time, I whipped one up in the last 24 hours.
Well, I chose brown yarn because the other options were gray and white, both of which looked dreary or messy. The cozy itself was pretty easy to make, but I had trouble getting the soap in when I was done. I may have made it a bit too small! The bar was unused, but a few months ago (while I was home last for Christmas), I had unwrapped it and put it in a soap container (which still had water on the inside). Because of this, the soap was infused with water and was moist and creamy, so when it was a little big for the cozy, some extra soap just kinda slid up the edges and formed lovely curls, which I promptly destroyed by shoving them back in the top before pulling the i-cord through.
I haven't used it yet (but I will when I shower tonight!), but my mother is convinced that it's going to become moldy and kill me with bacteria in my sleep, or somesuch. I'll be sure to let you know if it does.