I had had a competing mug for over 12 years. While it worked ok it was time to replace it. I got one of these and love the way it fit my hand, sealed and sat in my cup holder in my car. While I doubt that it will keep my coffee hot for the described period of time, it will still be sufficient for my use. They seal great! My wife had me get one for her. They are not Yeti's but they'll do just fine for most people's demands.
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