Title: 4 stars for Amazon cust. service!
Review: I wanted to give a better rating to this product because of 2 things: first, the great Amazon support, and second, because of the first contigo I bought last year, a 6 star product. But as i count on customer reviews to make buying decisions myself, i had to be clear about my opinion. these seem to be pale versions of my initial contigo, they don't lock as properly and securely, and obviously they don't keep drinks warm. my first contigo would keep them almost burning after many hours, which amazed me and got me to order a few more for me and my friends. i can't explain how such a supremely efficient product was turned to a disappointing experience, except maybe for possible 'copies' of the real thing. Amazon was very supportive in dealing with this, but the product quality is really not what i expected from Contigo.
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