"A Thermos, as you probably already know, is just a special kind of container that insulates whatever liquid it is containing. That means that it is very difficult for heat to flow in or out of the Thermos. However, a Thermos is not a perfect insulator, and there is some heat that does flow in or flow out.
"Before we look at the answer to your question, there are a couple of things you should know about heat flow. The first thing is that heat always flows from the hotter object to the colder object. For example, when you put an ice cube into a glass of warm water, the heat from the water melts the ice cube; the ice cube does not make the water hotter! The second thing is that the rate of heat flow between two objects is bigger when the temperature difference between them is bigger. That means that if you put an ice cube into a glass of cold water and a glass of hot water, heat will flow from the hot water to the ice cube faster than from the cold water to the ice cube.
"Now let’s consider what happens when you have liquid contained in a Thermos, and see if we can come up with a plausible answer to your question. When a hot liquid is contained, heat will flow from the liquid, out of the Thermos, and into the room because the liquid is at a higher temperature than the room. Water boils at 100 degrees C, so let’s estimate the temperature of your generic hot liquid to be somewhere between 80 and 100 degrees C. Room temperature is approximately 25 degrees C, which means that there is a difference of 55-75 degrees between the temperature of the hot liquid and the temperature of the room. When a cold liquid is contained in the Thermos, heat will flow from the room into the Thermos. Since water freezes at 0 degrees C, let’s estimate the temperature of your generic cold liquid to be somewhere between 0 and 10 degrees C. Then the difference in temperature between the cold liquid and the room is only 15-25 degrees; this is much less than the 55-75 degree difference that we got with the hot liquid!
“When we taste the hot (or cold) liquid, imagine that we think that it tastes bad if the temperature has changed by 10 degrees. Since the temperature difference was much bigger that 10 degrees to begin with in the hot case, but not so different from 10 degrees in the cold case, the hot liquid will take less time to change its temperature by this amount than the cold liquid will, and the hot liquid will start to taste bad before the cold will.”
You know meh, if Contigo has some kind of sex tape of you doing unspeakable things, you can call the authorities. You don’t have to keep pushing these on us. There is a way out. And nobody has to see your nasty.
Noticed that the shots of the different color lid mechanisms appear to be actual different photos. Usually they appear to be photoshopped (or @kylethephotoguy is really like inhumanly good at positioning stuff).
Not sure which way feels better to my consumer eyeballs, tbh.
Does anyone have these? Does the top “open up” like the West Loop for easier cleaning? The Contigo West Loop 2.0 tops are so much easier to clean than my original Contigos which always got crud stuck in them over time.
@sammypedram hi fellow HEMer. I have purchased 2 of these the last time they were made available and they work like a pro. They don’t leak, sweat, stay cold overnight and hot for hours. I’m so glad to see them again because my parents love them and will be great for my dad since he just had back surgery yesterday afternoon. My Doc. fell in love with them to, she was a little shaken when I took a drink then turned it upside down on her desk. I bought 2 of the Stanley’s also but they sweat severely. The only complaint I have is I wish it was larger. Other than that I am very happy to have purchased them here at MEH. Hope I helped you in one way or another. Peace out!
I went ahead and took a hard look at my lifestyle and it looks fine to me. The 24 oz Bubbas I got a while ago are providing wholly satisfying amounts of coffee. (Well, especially when both of them are full of coffee, some for the morning and some for the afternoon.)
I paid 14 for one of these on Amazon however i use my Big Bubbas i bought on meh… Meh "MORE GUMMY BEARS DUDES I GAVE ONE BAG AWAY AND ATE THESE BY THE HANDFUL …PLEASE CAN WE DO A DIFFERENT FLAVOR ON THE 2/18 DEAL? THANKS MEH "
It makes me sad to look back at my account history and realize I paid $18 the first time I saw them here. Insulation qualities are decent, but the vacuum apparatus is a bitch to keep clean and if you neglect to clean it properly or at all, you’ll never get rid of the mold smell/taste ):
Maybe this is just user error, but all the Contigo double seal cups have started to smell completely disgusting due to liquid getting stuck in the locking mechanism. Even if I flip the cleaning latch open and scrub, I can’t get it to stop smelling horrible. I threw them all away.
The clear contigo water bottles with a single seal do not have this problem.
If you want hot to stay hot longer, you can pre warm the cup by putting hot tap water in before using it. This lowers the temperature difference between the hot liquid and the mug and slows down the process described in the excellent if a bit TLDR Thermodynamics post.