Outdoor / Portable Bathtub (Wheat Ridge)

This is made of waterproof fabric, presumably nylon. It has a draining valve at the base. Works for average size adults and smaller, including kids. You could try an immersion heater to make your own portable hot tub.
It does need a good cleaning with a stiff scrub brush, and there is sun fading, but that’s just from being out in the weather this past winter. Other than that, it’s in great usable condition.