– A beautiful silhouette and practical slim form factor. One of the reasons why I did not opt for the TK Pro (that’s the standard thermos from Klean Kanteen).

– Relatively lightweight for a thermos. The second reason why I prefer the classic over the TK Pro (440 vs 620 g).

– Klean Kanteen is very transparent about their production processes

– The whole thermos is made from stainless steel (aside from the replaceable rubber seal ring).

– It comes with a limited lifetime warranty.

– And the most important fact: it holds liquids hot for 24 hours and cold for 63 hours, which is very impressive.

All those aspects make it easy to choose this thermos among all other options on the market.

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