I've just purchased another two of these mugs, to replace a couple that I bought about 10 years ago. They have finally given up the ghost after years of abuse and regular service. Depsite being battered and dented, it was only a final drop when full and landing directly on the plastic lid that killed them. I note that these re-designed ones have metal lids now which is even better.
These mugs are the perfect volume, have great heat retention, and no stupid handles. Perfect for throwing into a bag, without worrying that they will leak. And at the same diameter as a can of drink, they fit snugly into most car cup holders. I love them, and if I get anywhere close to another ten years out of these new ones I'll be very happy.