In one fell swoop, the traditional hot tub has become obsolete, because a guy named Ben Frederick just invented something called the Hydro Hammock and it looks awesome. It's a hammock that's also a hot tub. Every thought about putting water in a hammock? Probably not, because you're not a mad genius. But now you can, and there's a technical explanation for why it works, which Ben will explain to you if you're interested. He also says in the Youtube comments section of the above video that the video will be taken down soon and replaced with a shorter ad, so here are a bunch of stills of people playing in their Hydro Hammock, for posterity.