Floatable jellyfish-like vessels that create "temporary, ephemeral zones of privacy: an absence of phone calls, emails, sounds, smells and thermal patterns left behind by others."

Through various electrical systems they would be able to prevent access of GPS devices, television broadcasts, wireless networks and other microwave emissions. Finally, by creating a "blurry barrier" and a ground-plane camouflage pattern, they provide shielding from the unembarrassed gaze of security cameras and surveillance satellites. "For many people the vessels are nothing more than a rumour ..."

All a bit sci-fi conspiracy theory but an interesting concept.