Did not keep my coffee hot

The flask did not work in keeping things hot. The coffee was warm (instead of hot) in under 30mins. I had heard such good things about Hydro flask, and several of my friends use it that I had a hard time believing it didn't work. I thought maybe I did not seal the lid properly, but the same thing happened the next time too (after making sure everything was done right). I don't know if the product is defective, but unfortunately I will be returning it. Loved the size, design and color though.

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