And another post on SN on this:

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

cryptocoin

And here's a post with an example of this in practice:

*Modern day banking | [@meta_trinity](https://Twitter.com/meta_trinity)*
https://stacker.news/items/15317
https://twitter.com/meta_trinity/status/1504928111523205121

bitcoin

Best Metal Seed Phrase Storage Comparison (Cheap VS Expensive) | Jeremy Dance

*Metal Bitcoin Seed Storage Reviews*
https://jlopp.github.io/metal-bitcoin-storage-reviews/