But then I saw a similar concept with clapper sticks.
So I knocked one up to see what like, the material is some super cheap nylon or something, the stitching is all over the place and its a bit faffy to blow up but far better than a balloon bed with cold fingers and its much wider
Thy are pretty resilient things and can be let down but quite difficult to totally empty. It might be possible to make a hole with tape over as an exit valve.
