State-of-the-art seed phrase backup.
https://beta.penlock.io

For those who don't trust computers, an innovative mechanical product exists to create a seed phrase.

By following instructions, you print out and assemble paper components to generate a 12-word seed phrase without relying on any device.

Even more impressive is the method's ability to Shamir-split the seed phrase into 2-of-3 parts, which likely utilizes the SLIP-39 technique or something similar.