My wife recently got me a new travel coffee mug and it’s the best one I have ever had as far as keeping the coffee really really hot for a long time. It is very thin walled and I just don’t understand how the heat does not transfer to the outside surface of the cup.
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If the wall is just metal, then the heat will be transferred as metal conducts heat very well. If this isn’t happening, there must be a layer of something that isn’t metal in there. Most companies love to advertise their tech for doing stuff, you can probably find out more if you look up the product you have.
It’s probably a thin double walled vacuum sealed up. This makes it really hard to transfer heat from the inside shell to the outside shell.
If the wall is just metal, then the heat will be transferred as metal conducts heat very well. If this isn’t happening, there must be a layer of something that isn’t metal in there. Most companies love to advertise their tech for doing stuff, you can probably find out more if you look up the product you have.
If it was just a thin metal wall then the wall would quickly feel hot and the coffee would cool down.
Chances are that’s not the case, based purely on you saying that it works really well. It is probably double walled with either a thin layer of some insulation between the two metal walls, or if the metal is thick enough it could have a vacuum between the walls.
It’s probably a thermos. The mug is made of two layers of aluminum with a gap between them. In high quality thermoses, this gap is vacumed out but either way this gap is extremely difficult for heat to cross. You’ll still get heat loss from the rim and cap but it’s very slow, keeping your coffee hot longer.
If it was just a thin metal wall then the wall would quickly feel hot and the coffee would cool down.
Chances are that’s not the case, based purely on you saying that it works really well. It is probably double walled with either a thin layer of some insulation between the two metal walls, or if the metal is thick enough it could have a vacuum between the walls.
It’s probably a thin double walled vacuum sealed up. This makes it really hard to transfer heat from the inside shell to the outside shell.
It’s probably a thin double walled vacuum sealed up. This makes it really hard to transfer heat from the inside shell to the outside shell.
That depends on what you mean by thin walled. A soda can usually have less then 0.1mm thick walls. But in order to make the walls rigid and durable you would have to make the walls at least 0.5mm thick. This is the advantage of using metals as you can make very strong thin structures. But most travel mugs are double walled. And if we take two of these 0.5mm thick metal walls and space them 5mm apart we get a total thickness of 6mm. That is about the same thickness as a thin ceramic mug. But there is 5mm of insulation in the form of vacuum or a thin gas.
It’s probably a thermos. The mug is made of two layers of aluminum with a gap between them. In high quality thermoses, this gap is vacumed out but either way this gap is extremely difficult for heat to cross. You’ll still get heat loss from the rim and cap but it’s very slow, keeping your coffee hot longer.
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