A well made thermos (like my zojirushi) will keep stuff cool for more than one day. And coffee hot from dawn till dusk. No batteries or cables required.
I'll never understand these things.
I'll never understand these things.
It will also keep your coffee lip-blistering hot for way too long. Keeping things hot with a vacuum flask is a problem solved 100 years ago. But that's the other side of these mugs: they are supposed to bring the temperature down to (and keep it at) the temperature you specify. Double-walled mugs don't do me any good if 30 minutes later the fluid is still at 198F/92C.
They're not fragile, the coffee stays just as hot for at least 4 hours if not much longer, and because "effective insulation" means "doesn't exchange much air" it also keeps it from oxidizing as quickly.
As pointed out in the introduction of the article, this is not the same use-case; there are some types of coffee or tea that require specific infusion temperature and duration, something you can’t do with a normal mug or a thermos.
You can however prepare them using a thermometer, you don’t need a "smart" mug.
If you're using an AI summarizer, maybe check the output more closely?
No need to be aggressive; I’m not using an AI summarizer. I pointed out this is a different use-case, and then gave an example based on my own experience. I’m sorry if this was not correctly worded and felt like this was the use-case the article was refering to.