I have a thirty year old Stanley and I can say for certain that the new Stanleys are only vague shadows of their former selves. Thin and cheesy. Sadly, the son took my old one on a camping trip and left creamed coffee in it in his truck for a week or more.
Hey son where's my thermos?
Uhhh, I think it's in the back of the landcruiser...
When did you use it?
Uhhh, when I went camping I think
That was two weeks ago, did you clean it?
Uhh...I don't remember....
For the life of me I cannot get the musty odor out of it. Bleach, orange oil, nothing works.