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Central Alberta | The best ones had a double-walled glass vacuum flask with mirrored interior surfaces. But I broke a few of them by dropping. The newer ones are mostly foam-filled and keep things hot or cold for a few hours at most, but they don't break. I use a double-walled coffee cup, which works about right, keeping the coffee warm for about half an hour, and doesn't get uncomfortably hot to hold. | |
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Stanley Thermous Bottles
