Freein Ice Bath Barrel Pro foldable cold plunge. The tub has inflatable sides and is a bit bigger than the cheap models that use poles to give them structure. It has valves to connect to a chiller, or could just be used with ice. Model details at https://www.amazon.com/dp/B0CMQ342C9

I used it for a year and liked it, but just upgraded to a larger tub.

Comes with the tub, cover, a pump to inflate it, a carrying case, and a patch kit (which I've never had to use).

Paid $200, asking $50.