The Hydro Hammock, a versatile hot tub-hammock combo, just might be the most relaxing new invention we’ve ever seen. Proud inventor Benjamin H. Frederick even created a portable heating system that will heat whatever water you use in your Hydro Hammock, be it lake, river or sea water. The hammock itself is made of resilient and waterproof tensile fabric that, according to the video on its Kickstarter campaign, can hold 2 adults and about 50 gallons of water.
The heating system currently runs on natural gas, though there are plans to expand to battery and solar electricity as well. A double-walled model lets you insulate it and use it during the winter, too!