https://wtop.com/tech/2019/04/lighter-than-air-aircraft-has-first-test-flight/It's full of helium...the stuff that makes one sound shrill and Caskur-ish when inhaled, but also boasts a solar powered bladder which sucks in and expels heavy and light air allowing it to perpetually be off in the clouds like a giant fart balloon...
Now if we can just attach enough solar panels to Caskur's lunch lady meat hooks...