I was just reading a post on SHOWER CAPS from my sisters blog The Good Life... On Less. It has been my traveling time saver! I have lots of hair and there is no way if I'm in a pinch for time I'll be able to wash, dry and straighten my naturally curly hair... especially when I have to wake up at O dark 30 to catch an early morning flight. I'm a little sad that hotels don't seem to stock rooms with shower caps any more.
Another good use for SHOWER CAPS: Put them on your shoes before you put them in your luggage to keep everything clean.