Check out the Co-Kra recipe about 8 posts down the page.

I came across this recipe last week while searching for something else and have been meaning to try it.

CurlyFireHorse also has a great method for using perishable gels... she freezes it in ice cube trays and determines how many cubes are needed for a single application. Then puts them in baggies. At the beginning of your shower, throw the baggie in the bottom of the shower. They are defrosted by the time you need them.