Looks like they use 18/0 ferritic stainless, which is 18% chromium 0% nickel.

Grok estimates 10s of mcg of chromium leaching per meal, which is fine as chromium is an essential trace mineral (unlike nickel) to which a can tolerate as much as 1000mcg a day.

This is actually... Promising.

https://grok.com/share/c2hhcmQtMg%3D%3D_28537afd-7976-486c-9942-aa9a7ae8735f