I'll also add, some time ago my starsan bottle got some kind of pinhole leak in the bottom. it's 80% full so I keep it in my second brew kettle that got retired probably 6 or 7 years ago. This was a dollar store find, probably 18 or 20 quarts when I was doing extract partial boils.
Not a pit to be found and this is the undiluted starsan concentrate I'm talking about. If dollar store stainless can take it, I gotta think just about any 304 stainless can.