You can't buy this on Amazon--or anywhere else. Only the Earth to Sky Store has the Cosmic Cat Wine Stopper.
 
On Dec. 17, 2025, this handcrafted resin bottle stopper flew to the stratosphere onboard an Earth to Sky Calculus cosmic ray research balloon. At the apex of the flight, it floated 113,401 feet above the Sierra Nevada mountains of central California.
 
For $99.95 you can have the collector’s item along with a gift card showing the stopper flying through the stratosphere and telling the story of its flight.