outdoor solar shower

I'm interested in putting in a shower somewhere near the pool area outside. It would need to be fed from a garden hose, as I'm sure most are. However, we would like to have the luxury of warm water (heated by the sun) on those days where it's possible. Has anyone come across a nice looking shower that has the capability to take water via a hose and store it for heat collection? I've seen one strange plastic thing that's not too good looking. I'm also not looking for a camping solar shower either.

I there's not something prebuilt out there, how difficult would it be to make something fairly unobtrusive. Say a capacity of 5 gallons or so?

Thanks all.

Chris