How about The Waterbaby (click on the picture to enlarge it):
http://www.atvconnection.com/Departments/Dune_Desert/waterbabysports.cfm

I can't seem to make the Waterbaby web page work. I don't know if that means that they are out of business or not. So if you are interested, keep trying since they might just be down at the moment. I would love to have a Waterbaby Sports pump! This is their website. I hope they haven't gone out of business: http://www.waterbabysports.com

If anyone has had experience with the Waterbaby, I would like to know what you think about it?.

I had a solar shower that I really liked. It was the Stearns brand. I think it was discontinued because I can't find it on the internet. The one I had had a pump and held 7 gallons. I will get a smaller one next.

Joy