The US Mint has just released a dollar coin honoring the Hubble Space Telescope.  You can have one like no other. *This* coin has flown to the edge of space.
 
On Jan. 15, 2021, the students of Earth to Sky Calculus flew a whole roll of Hubble coins to the top of Earth's atmosphere. Launched Jan. 15, 2021, as hitchhikers on board a cosmic ray balloon, the coins spent 2 hours in the stratosphere floating as high as 35.3 km (115,814 ft) above the Sierra Nevada mountains of central California. After the balloon popped (as planned), the payload parachuted back to Earth, landing near the Ubehebe volcanic crater in Death Valley National Park.
 
You can have a coin from the roll for $49.95. Each one comes with a greeting card showing the coins in flight and telling the story of their journey to the stratosphere and back again.