Librature has a list of DRM free individuals and small presses https://libreture.com/bookshops/

Oh I forgot also if you check the details on kobo, some of the books are sold DRM free. Mostly I think it was from Tor, but could be other publishers as well.

There’s some reports that the interaction of soaps and shampoos influence how tasty a person smells, so it might be worth trying different products.

https://www.prevention.com/health/a43863971/different-soaps-may-make-you-more-attractive-to-mosquitoes/

Write MP3s to them and use them to play one song in a modern car.

(I saw a video of someone playing a clip of music using a USB floppy drive)