Bests & Worsts Reviews from Amazon

I got one of these for Christmas two years ago, and it was the BEST. This mug keeps liquid warm for literally 6-8 hours. It's great. Amazing. Nothing in this review refutes that this used to be a great mug. This would be a 5-star review except... My guess is that Thermos switched to cheaper parts or had some kind of breakdown in their manufacturing within the past year. I bought my wife one, and within a week (with no mishandling) the twist-switch on the lid broke. Not the actual part you touch, but something inside the lid broke when you went to open / close the pour hole. This made the thermos stuck as always-open and unusable for travel. Bummer. We must have gotten a bad one, right? So I shelled out the money for a replacement. Again, within one week and no mishandling, the EXACT same thing happened. The thermos was stuck as always open. Clearly either there was a manufacturing error on an entire batch of them, or Thermos switched to cheaper parts. We sent Thermos a message asking for a replacement, but they refused to replace the two mugs. They offered to send ONE replacement part if we agreed to pay shipping. No thanks. It's a shame because my original mug was so nice, but we will not be investing any more money in Thermos products.