The Bureau of Engraving and Printing sells them through the official government website, priced above face value as collectibles. Every note can be cut out and spent. Handing the whole sheet to a cashier is also valid, though they will silently curse you.
Credit: JFitz717



You tell that to the strip club that banned me!
You’re not supposed to hold them over a lighter before throwing them…
Strippers deserve fives, at least, come on
Sure! But then my “make it rain” kind of becomes a “make it drizzle slightly and only once”, which isn’t as fun!
Did you make it hail?