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Butlerian_Jihadi t1_ixwa6qx wrote

Reply to comment by [deleted] in Zojirushi SM-KHE48. Used daily for 6 years. Retains heat better than a Yeti, fewer $$$. by home_cheese

I've also used mine for five years now and adore it.

They use a layer of gold foil in their vacuum void, which reflects something called blackbody radiation. It's near-infrared light that anything much above absolute zero emits, and is the main way to lose heat once you take conduction out of the equation.

You definitely have to make sure your beverage is at drinking temperature when you put it in - I just brew my tea to allow for three ice cubes and it's at the perfect temp for the next eight hours.

It's also important to clean the lid properly, which seems a chore but takes about one minute. I like to use unscented denture cleaner with mine, just disassemble and drop it all in, wait two hours or so and rinse.

They also make excellent food jars and amazing high-end rice cookers.

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batcake42 t1_ixwdgk4 wrote

Isn’t black body radiation how they made ice in the desert thousands of years ago? Insane how it’s now being used for an insulated cup! That’s wild!

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Butlerian_Jihadi t1_ixwee1o wrote

Not sure about that, kind of doubt it. Blackbody radiation is when something gives off energy as photons due to its heat. Things have to get worse pretty hot for us to be able to see it (think a glowing fire poker or the ember of a cigarette), but that radiation is still being emitted even if it's below our ability to perceive it.

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TonyTheTerrible t1_ixwz99e wrote

> It's also important to clean the lid properly, which seems a chore but takes about one minute. I like to use unscented denture cleaner with mine, just disassemble and drop it all in, wait two hours or so and rinse.

thats the part i cant deal with. i know me and my bifl purchases have to be more than reasonable to upkeep. i just got a stanley thermos because the top is easy to clean (internals twist out in 1 unit) and it turns out the thermos part is pretty decent too.

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