Do you know any quick tricks to keeping coffee hot for a long period of time?
You can check the answer of the people under the question at Quora “keeping coffee hot for hours“
Do you know any quick tricks to keeping coffee hot for a long period of time?
You can check the answer of the people under the question at Quora “keeping coffee hot for hours“
Yes. It depends on the container you use. A former boss of mine swears by the Yeti brand.
Yetis are known to keep cold drinks very cold and hot drinks steaming hot for hours.
Personally, I like Zojirushi. It’s a Japanese company that makes rice cookers,
lunch thermoses (called Bento thermoses),
and drink containers.
I use my rice cooker almost every day and one of my Zojirushi drink or food containers every day. The food containers are great because I don’t have to use the fridge to keep it safe to eat until lunch (the fridge at work can be a disgusting mess and it is falling apart due to extreme abuse).
The key to all of the containers, be it Yeti or Zojirushi, is to pour steaming hot water in the container for hot liquids or lots of ice and cold water for chilled drinks. If the container is heated or cooled to the correct temperature BEFOR…
A little physics knowledge can go a long way!
Heat can transfer via convection, conduction, and radiation. You just want to minimize all 3.
Convection is easy to avoid by having a lid on you coffee cup. That keeps air currents from cooling your coffee.
Conduction is 100% stopped by a vacuum. Have you ever wondered how a thermos can keep liquids hot for hours with no insulation? It’s because they make the thermos with 2 walls and have a vacuum between the walls.
Radiation is stopped very effectively by a thin layer of metal. Even aluminum foil will do the job very effectively. Anything that sparks when you put it in the microwave is a good absorber of radiation. Hot coffee emits a lot of infrared radiation. A pair of reflective metal walls acts quite effectively to block that energy loss.
So, when you buy your next coffee cup look for one that has double metal walls with a vacuum between the walls and a lid.
Obviously that describes the traditional vacuum thermos, but those aren’t really designed to drink out of.
Maybe a Yeti Lowball Rambler is what you’re looking for: Rambler Lowball – 10 oz.
Put boiling water in your coffee cup for a few minutes before pouting your coffee in it.
What ever you put it in, preheat the container hotter than the coffee if possible like fill the bottle with boiling water after heat transfer has taken place replace this now cooler water with the coffee.