The Wolke 7 concept, designed by Timon Sager, is "the perfect combination of travel and feeling at home." Slung underneath the doubled up zeppelins is a three floor house that includes all the comforts of home, along with several giant TVs, a hot tub, and what appears to be a full-size grand piano.



The buzz-killing physicists among you are probably busy pointing out that there's no way the volume of gas inside those balloons can possibly lift a three floor house with a grand piano inside it. But you know what? This is a concept, so let's pretend that these are carbon nanofiber envelopes filled with nothing. Yes, that's right, this is a vacuum airship, eschewing a lifting gas for a lifting lack of gas, making it 15% more efficient at lifting itself than helium, which ought to cover the piano and the hot tub. So take that, physics!

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