Title: Not that "vacuum"
Product review: I don't know if this is the case only for what I got from Amazon.com, or all of them are like this, but mine was not a good insulator at all. I previously had a Thermos 16-oz Travel Tumbler which had an excellent vacuum insulation though would leak through the lid. So I chose this Thermos Nissan model according to the ratings and reviews. Although it is really leak-proof, I am disappointed with the insulation. The outer surface gets sensibly warm when containing hot liquid, which means noticeable THERMAL LEAKAGE.Thinking of returning it.
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