Another thing to check, do you pre-warm the bottle? If not, it will absorb the heat of (ie, cool down) the coffee as soon as you pour it in. But if you get scalding hot water from your faucet or a kettle, pour it in, wait a minute, and dump it you will have a warm bottle that won't feel the need to take as much heat from the coffee.
this post was submitted on 12 Mar 2026
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Zojirushi is the GOAT as far as I'm concerned. No other brand I've used has kept my coffee hot for as long as they do.
My only gripe is that they like to over-engineer the cap/pouring mechanism in their travel mugs, which makes them tough to clean.
It's been awhile since I've had to replace one, but if I recall you want to get the plain stainless interior for coffee / tea, as it picks up less staining and odors than the coated interior.
Slightly off topic, but there is a product called Astonish, which is amazing for cleaning travel mugs and other things that collect coffee oil buildup. Its hard to find in the US at least, but can be found on Amazon.
Lots of people recommended Zojirushi in this thread. Will definitely give it a try. Thanks
coffee oil buildup
I noticed when I started using (stick blended) coconut (mct) oil instead of milk buildup just dissolved over time. Would likely work to just soak in hot in hot oil...
I use polident to clean my Zojirushi container.
I'll have to give that a try, especially if it means one less thing I rely on Amazon for.
Think you said it best in your post - you need a Thermos.
As in an actual "Thermos" branded one.
I got one of their pint sized food flasks with a folding spoon and screw on cup/lid cover that's so efficient I've got to make my coffee the night before if I want to drink it in the morning, or add cold water if I forget, otherwise it's only cool enough to drink about 12h later.
Those old vintage ones can keep coffee at boiling temperature for most of a work day.
Even the newer fully metal ones are solid (pun definitely intended)
I just looked up the food flask design and I quite like that.
I can recommend Zojirushi, keeps hot for long and they are easy to drink from.
The metal portion should not be radiating heat. Implies there's something not quite right with the vacuum seal. If it's new, you might try returning it & asking for a replacement. If it's only mildly warm, that might be normal - have you considered getting a knit hat to place over that area to further insulate it (yes, I'm too cheap sometimes).
FWIW, I've had great luck with my Stanley thermos for doing exactly what you're doing, keeping coffee hot for hours. I also like Zojrushi's products - I have a smaller one I use to keep my creamer cold.
Well the body of the thermos does not radiate any heat.
It is the section near the cap. That section is just single layer metal which leaks a shit load of heat
Klean Kanteen has worked great for me. Kept tea that my girlfriend and I made at 7:00 too hot to drink at 13:00. And that was at a snowy mountain lake β the time in between was spent snowshoeing up a mountain trail in the middle of January.
Maybe a silly question, but do you preheat the inside of your thermos with boiling water before adding the coffee from the moka pot?
If not, that small amount of coffee would be quickly cooled by the inner walls of any thermos.
I don't, but I am pretty sure it doesn't get cooled down by the inner walls as it stays too hot to drink for at least an hour.
Will check out your recommendation.
Preheating makes a big difference
One with glass insulation but those are breakable. Moka pot coffee kept hot that long will probably taste like crap anyway though.
Yeah probably. It'll all get stale and burnt ig. Didn't think about that much
Coffee outside is expensive and pretty bad though. I need to carry my own coffee to school but no idea on how to do it.
Drinking it at home is not very viable since I already wake up at 6am and don't wanna add another 30 minutes to my morning routine
Aeropress, ground coffee, and a yeti rambler mug.
Can you heat water at school? Or just bring hot water and instant coffee. Or an aeropress if you're a coffee snob. I like VinacafΓ© on the go, and have just found something similar whose name I can check tomorrow.
Yeah they do sell hot water.
Currently planning to pack a french press. We'll see how it goes, but I still want the thermos.
Since I use Hoffman's french press technique the only thing I do is to dump coffee in water and wait anyways. So I might cut the filter from a french press and put it inside a thermos. I could then get it set up at home and just add waterβ’
They SELL hot water? What a scam. Maybe bring an immersion heater?
It is pretty commonplace to sell hot water in my country?
Because bringing a heater with you is hard, the places which sell tea will also fill up your cup with hot water. For a fair price usually +5TL (~0.1 cent) more compared to bottled water of the same amount.
I can bring a heater and spend my university's electricity for it but why would I so that when hot water is already very cheap.
edit: I just remembered my school's water dispensers have a hot water tap. Students drain those very quickly though so I gotta go there right after my lecture ends
Bottled water is another scam though! Yes, use the hot water tap. But, doesn't Hoffman's French press method require near-boiling water? A hot water tap is typically maybe 60C at most.
Here's the type of heater I was thinking of: https://www.ebay.com/itm/311442084287
That's a US version (120V) but I'm sure they have 230V ones if you need that. Another idea is a camp stove.
incredibly inconvenient
Imagine sitting in the corner near the plug with your weird resistive heater waiting for the water to get hot. You'd probably become the laughing stock of the whole campus pretty quickly
Also, things get pretty heavy when you have a 4 hour daily railway commute. There has been times when I didn't take a bottle of water because it hurt my back
So I'll just stick to carrying grounds and buying hot water. It costs practically nothing compared to my current habit of buying coffee which is a huge hole in my budget
I have this Yeti with their screw top. Work pretty well but Iβve never tested it on a 2 hour time table
I go thermos brand for my water, keeps it cold all day