Great travel case for a brush

If you have any empty perscription bottles lying around, just rinse one out, drill some holes in the lid and pop the brush in there. If you don't have any, a pharmacist should usually be willing to give you an empty or sell it at cost (under a buck).
This idea isn't mine, it came from McNutt on SMF but I thought I'd share it with you guys. I know I'll be doing this when I go on vacation.
Another idea (tryphon @ SMF) was to drill a single hole in the lid and a few more on the bottom of the box to prevent bristles from sticking out.