Well that's a pretty cheap etcher and some plates too, which would be a neater way to keep them, but each to his own. 

What about a mason jar lid and a cheap engraving device?

PlebeiusG

Sorry the markdown link didn';t work, here's the video url
https://www.youtube.com/watch?v=_VawkuLS3G8

ClickForCharity

I found a lot of metal plate seed phrase preservation "systems" while searching. Most a ridiculous amount, evne as high as 300 dollars. Here;s a simple etcher and plates for less than  20 dollars.

https://www.save-your-bitcoins.com/

bitcoin

I found a lot of metal plate seed phrase preservation "systems" while searching. Most a ridiculous amount, evne as high as 300 dollars. Here;s a simple etcher and plates for less than  20 dollars. 
https://www.save-your-bitcoins.com/
see the video demo... 
[![Watch the video](https://imgprxy.stacker.news/MVCprracVFX4mbGaKPTESvMjfvWOhispQ5ixubM57oE/rs:fit:600:500:0/g:no/aHR0cHM6Ly9pbWcueW91dHViZS5jb20vdmkvX1Zhd2t1TFMzRzgvZGVmYXVsdC5qcGc)](https://youtu.be/_VawkuLS3G8)