The best vacuum flasks keep drinks hot from morning through to night. We've reviewed the best Thermos flasks, along with vacuum flasks from Chilly's, Stanley and Hydro Flask, and cheaper own-brand ...
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Consumer Reports: How to keep your coffee hot longerThe Thermos Stainless King is a bit cheaper and keeps drinks hot for seven and a half hours. Then there’s the Takeya Traveler, which should keep your cup of joe blazing for six and a half hours.
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