For anyone that needs a stainless steel single walled canteen they can boil water in and have it last a lifetime, this company is the way to go. It has survived countless fires, many sitting directly in a bed of coals. Yes, when I was younger I used it as a target for a Daisy rifle lol.

https://www.kleankanteen.com/collections/non-insulated-water-bottles/products/water-bottle-classic-18-oz?variant=1207956340761#Image31703210688707