You can't buy this on Amazon--or anywhere else. Only the Earth to Sky Store has the Cozmic Cat Wine Stopper.
 
On March 15, 2026, this hand-carved wooden stopper flew to the stratosphere onboard an Earth to Sky Calculus cosmic ray research balloon. At the apex of the flight, it floated 101,333 feet above the Sierra Nevada mountains of central California.
 
For $79.95 you can have the collector’s item along with a gift card showing the stopper flying through the stratosphere.