Lush New! is a cinnamon and clove shampoo that's a solid and can be kept in a travel tin.
I'm trying not to overstate the case, but I love this stuff. I don't know that I will ever use a liquid shampoo again.
The first time I tried New! I followed the directions, wiping the moistened bar on my wet hair a few times. When I started working it into my hair, I was stunned at the huge amount of suds. More than that, I had one of the best hair days I've had in years. Now I have a good hair day every day.
And because it's a solid, the shampoo is a natural for carrying instead of a liquid, which can create problems if you're going through security and have too much of it or if it leaks in your suitcase.