I take a 2 hour commute to school every day. My Stanley thermos, which was gifted to me by my very consumerist aunt, doesn't keep my moka pot coffee hot for 2 hours.

Although it is a pretty good thermos it seems to be leaking a lot of heat from the metal section near the cap.

Is there any thermos that has every section of it isolated? Like, I shouldn't even be able to tell if there is a hot liquid inside

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

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 Vinacafé on the go, and have just found something similar whose name I can check tomorrow.

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 – 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.

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 water™

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.

I go thermos brand for my water, keeps it cold all day

Aeropress, ground coffee, and a yeti rambler mug.

I have this Yeti with their screw top. Work pretty well but I’ve never tested it on a 2 hour time table

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.

Zojirushi is a good brand (Japanese but you can get their stuff in the west, e.g. on Amazon). I've only used their thermos for cold beverages, but it's rated for hot as well. Comes in 16oz and 20oz IIRC. They may have a bigger one, too.

Stanley is one of the best.

People swear by Yeti, but I think it's overpriced fashion. I kind of want one of their 12oz mugs for coffee at work. I like the style.

The problem with Zojirushi (I've owned two of the black 20 oz thermoses) is the gaskets in the cap that keep the beverage insulated at the top are prone to disclouration, after which I don't trust them. Reviews say you can, but I don't. With Stanely, the gaskets are easier to clean, remove/replace, and, I think you can easily order replacements. I don't think you can with Zojirushi. Otherwise, Zojirushi is very hard to beat.

Zojirushi official: https://store.zojirushi.com/collections/vacuum-insulated-mugs-bottles

Amazon (not affiliate): https://www.amazon.com/zojirushi-thermos/s?k=zojirushi+thermos

Target: https://www.target.com/s/mug+thermos+zojirushi

Walmart: https://www.walmart.com/c/kp/zojirushi-thermos

So, there are some options (the first four search results on DDG) and you can see what they offer. If you look at the pictures (especially on the official one) you can sometimes see the top gasket. It's kind of shaped like a pacifier, and it plugs the plastic mouthpiece you sip from. It does its job well, it's easy to remove (pulls off a straight plastic plug), but if you don't clean it several times a day, it gets these weird black spots on it. I see the black spots, I think mould, whole thing goes in the bin. Then there's the mouthpiece itself. If you remove the cap, and then place your thumb in the mouthpiece and push down, the mouthpiece pops out the bottom with a bit of force (maybe more than you're comfortable giving, but it won't hurt the lid). At the bottom of the mouthpiece is a second gasket that is hard to remove and difficult to clean. This also must be cleaned multiple times a day, or it too gets black spots and other discolourations. This having direct contact with the beverage makes it the bigger problem. Plus, you don't see it, so, "out of sight, out of mind."

I still think their thermos might be what you're looking for, just keep some way to sanitise the gaskets handy and keep them clean. People say those thermoses last a lifetime (same with Stanley) but you really gotta keep up with the gaskets.

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.

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.

Preheating makes a big difference

I use polident to clean my Zojirushi container.

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 can recommend Zojirushi, keeps hot for long and they are easy to drink from.

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

I just looked up the food flask design and I quite like that.

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.

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

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)

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

Lots of people recommended Zojirushi in this thread. Will definitely give it a try. Thanks

I'll have to give that a try, especially if it means one less thing I rely on Amazon for.