While Westerners prefer bathtubs that allow them to stretch out, in space-tight Asia soaking-style tubs are more common. China-based Hangzhou Yunqiu Industrial Design Co. designed this soaking tub that folds, allowing even small-apartment dwellers to take a relaxing dip.

"How do you fit a bathtub into small apartment living? This Folding Bathtub has a collapsible structure that allows it to be expanded for a bath and stowed away after, thus saving space when not in use. Its cylindrical shape can be collapsed and folded to 1/6 of its expanded size, making it easy to store or be hung on the wall."

"Using a modular design, the main support structure comprises upper and lower fibreglass rings, held up by six metal bars spaced out evenly to form a cylindrical shape. The skin of the bathtub is made with a flexible PVC-laminated cotton cloth that is layered with an insulation material."

"Folding Bathtub doesn't have to be [permanently installed within] a space and when expanded, it only takes up 1 square meter of [floor] area."

Although the design was commissioned by an e-commerce company, if the object is in production I could not find the relevant link. My guess is if it exists, it's Chinese-market only.