There was recently another post on SN related to this:

Best Metal Seed Phrase Storage Comparison (Cheap VS Expensive) | Jeremy Dance
https://stacker.news/items/16204
https://www.youtube.com/watch?v=Gi0TRyVqHG8

cryptocoin

Here's a post on SN about the Blockmit:

*Make your cold wallet with washers | Blockmit.com*
https://stacker.news/items/9266
https://blockmit.com/english/guides/diy/make-cold-wallet-washers/

> ![Blockmit](https://static.wixstatic.com/media/e65a7a_6496ded9fc2d41638b6da49355db5729~mv2.gif)

*Securing a Bitcoin seed phrase in stainless-steel washers (abridged).*
https://www.econoalchemist.com/post/backup