There are many options to choose from when it comes to securely writing down your Seed Phrase and keeping it safe.
Here you got a lot of options: https://jlopp.github.io/metal-bitcoin-storage-reviews/
But if you want the cheapest one that still works like a charm, here it is:
Print this 3D model yourself, or ask a friend to do so (as I did) if you do not have a 3D printer: https://www.tinkercad.com/things/6LnKVMshm6o-soporte-para-fabricar-billetera-fria-con-arandelas-v3
All you need next is:
- Stamping kit (found it at a local store for $5)
- 24 pieces of washers M8x24mm (very cheap)
- One M8 hex bolt and one M8 hex nut (very cheap)
After you have everything, simply stamp your 24 words onto the washers using the 3D printed model and the stamping kit. Afterward, place all the washers onto the hex bolt and secure them with the hex nut so they all stay in one place.
This is the video that inspired me to try this myself two years back. Might be helpful: https://youtu.be/3Aj_EHOu9WE?si=YVypJTxJJPpdXxYh Show Less
