The Hydro Hammock is a combination hot tub/hammock, which is better than a hot tub time machine. You can’t really relax in a hot tub time machine. Too much adventure. It is the ultimate in elevated relaxation.
It is available in both single and double occupant versions and is designed to hold the weight of 50 gallons of water plus two adults. If you ever get a chance to use one, just make sure you find a pair of extremely large and strong trees.
They Hydro Hammock is an as-yet unfunded Kickstarter project. You can pre-order the single or double capacity Hydro Hammocks for $260 and $390(USD), respectively, but that only gets you the fabric that you can fill with water. If you want to turn it into a hot tub you’ll need an additional $920 for the heater and pump. It looks super relaxing.