On not martha there was a link to slider tins that would be great for lip balm but the company that was listed no longer carries them. I found them at clay alley. They would be really cool, I remember having chapstick in similar ones when I was a kid.

Edit 10/22/04
I’ve found a cheaper place to order slider tins. They also come with a little shrink wrap sleeve.
Alyssa’s Soap Cottage