Love this mug,  I have had this mug almost a decade now.  Purchased is on a military base and it has been through a lot, to include a lot of countries.  I have used it almost everyday since I purchased it.  I has just now showed issues, and it was not even the products fault.  My kid wanted to do a "deep" clean on it and threw out the rubber-like stopper in the lid mechanism.  If this piece was available for purchase, I definitely would and keep jugging along.  Everything about this product has been great.  I have never seen anything close to it.