Earthlust did just that. They make a naturally safe stainless steel water bottle that is not only unlined (no plastic in this reusable metal water bottle!) but uses non-toxic paints, and looks good.
I got to try an Earthlust water bottle and I’m hooked. First, I like that the Earthlust bottles are just plainer prettier to look at than some of those other reusable metal water bottles. In fact, some Earthlust designs are inspired by what the owner sees around her during walks with her child. I love that. I’m a total sucker for something that has both good design and an interesting back story.