If for some reason the yacht where you're partying doesn't have its own tub, you can now bring along your own portable spa.

Australia's MSpa will provide all your needs, especially if your needs involve bathing with strangers in a bacterially agitated, 38-degree-Celsius stew. Oh, and there's a lockable cover. You know, so nobody steals the ladies who come with it.

MSpa holds up to four people and can take 210 gallons of water. It runs around $900 and self-inflates, so you'll have energy for, uh, hot-tub stuff.