"Rowan" wrote:Where might one find one of those....?
Caring hands sells them here. I have found this design the best of all the various ones I've used backpacking, and it comes with a tube and container for use in small planes. (Did I mention the dh is a private pilot? and I hate takeoffs and landings, and haven't much bladder capacity. So this little thingy was a kidney-saver.)
Somehow, it even gets the fluid to run uphill!