But stable partly musty taste / smell

Basically, that's a nice bottle that I myself like to take to the via ferrata or in the university, because it is extremely stable. A practical example: In the middle of the cliff it has slipped out of my hand, this fell some meters in depth and pitched on the rock. Although it only has one big scratches on the site, but you can still use it without problems.

But what bothers me most in this bottle is the fact that even though I only einfülle water bottle constantly emits a musty taste and odor of the liquid contained therein. This not only sounds disgusting, but it tastes and smells that way. Why is that, I can not really explain. I will give it again in the dishwasher, but the annoying monsters and is absolutely disgusting, if you sit in the midst of a lecture and it almost down a skin of the flavor from the chair.