Yeti Rambler bottle (not the mug) with their screw-in Hotshot cap. No, you can’t open it one-handed, but it doesn’t leak at all in my bag during my commute. One of the conductors on my train has one, too.

I’ve had a Miir travel mug for a long time, never spills on me. Confident enough in it that I’ll put it inside my backpack where my laptop is while I bike to work.

I’ve been using the Kinto Travel Tumbler and the Zojirushi Stainless Mug, pretty happy with both of them.

Fellow Carter Move (12oz). One of the best coffee equipment purchases I've ever made. I daily use since more than two years.

Kinto travel tumbler. I literally cannot fault it.

Fellow has an odour issue, by all means try them but buy from somewhere with a no questions asked returns policy in case you get a bad one. Some people seem to not have this issue, but I've tried both a wide mouth carter and a rocky and both had a lingering off smell after a single use (I'd describe it as a mix of soy sauce, garlic, and a little fish. I've smelled similar funks from industrial adhesives). Some people think it's down to the O rings, I can assure you it's the coating, since with the carter I never even put the lid on.

Mine doesn't smell but the (white) ceramic inlay turns brown from coffee oils very quickly if it doesn't get cleaned daily. Little bit annoying but doesn't affect taste that much in my opinion.

I have a Fellow Carter Go and I love it. It keeps coffee hot for hours (I'll make it at home, get to work and it's still scalding hot). I've never had any leak issues. The sip function is great too.

I have the Carter and was hoping that a travel mug with ceramic lining would preserve the taste of the coffee very well. But when filled in very hot it still tasted very different when I arrived at work, even when poured in another cup. I started to bring it down to drinking temperature before leaving by putting an ice cube into the mug and then filling in the freshly brewed coffee. This way the coffee tasted a lot more like it did originally when drinking from the mug after a while.

So maybe the issue isn't the stainless steel but actually keeping it very hot and sealed right after brewing.

I haven’t had a carter so can’t comment on that but I have had a bru mug for a couple months now and genuinely love it.

I haven’t had a single issue with it and I can say it is 100% leak proof. My party trick at work is filling it with coffee then jostling it around on top of my head.

I think having to remove the lid to drink on the carter would annoy me, the one hand open close on the bru mug is really convenient for me.

I find that the Carter mugs get smelly really easily, even if you’re careful. I’ve had 2 and it’s been an issue with both. Common complaint on forums too.

I have two Fellow mugs (Carter Go and the wide-mouth Carter Move). I use them constantly, at home and on the go. I love them and have absolutely no issues with retained odors or bad tastes. My coffee tastes great in them and stays quite hot, long enough.

I wash with hot soapy water and use a soft bottle brush to clean the ceramic-coated inside. I use a soft toothbrush to get any dried coffee out of the stainless steel threads, and to clean the threads on the lid. I think people neglect to clean the threads and the lid and gasket, which would certainly explain smells. Just have to be careful on the ceramic coating so you don't scratch it -- no metal implements or harsh cleansers/tools.

I really love their mugs and have given several as gifts as well.

For 100% spill proof and amazing thermal retention both hot and cold, the classic stainless steel Zojirushi cannot be beat. You have to commit to carefully and thoroughly cleaning the lid/gaskets. The Zojirushi can be thrown in your bag upside down and will never spill (as long as you close it correctly). I've had my 16-oz for 15 years! Have replaced lid/gaskets a few times. Now I use it only for water. It's not as nice for drinking and tasting your coffee as the Fellow because it's such a narrow mouth, and it's stainless, not ceramic. But still great.

I have used the transit bottle for months. No leaks, easy to drink from, slim and not bulky. I’m going to buy some more.

I agree with everything everyone's saying! Love mine, I have three! Wish they would come out with some cool new colors. One word of advice don't drop it on a hard surface like I did. It will break the vacuum seal inside and not keep your coffee hot any more.

Hey, did you try it? Want to buy it as a gift for my girlfriend but not sure!

I have the aerolight transit bottle and yes, it truly is leakproof.  I find it fairly easy to drink out of and it has a good flow.  My nose doesn't press up against the top either (I have an average sized nose).  Keeps my coffee hot for a long time.

Highly recommend.

Sip by S’well is good and they come in a variety of colors and designs.

Zojorishi. Period. Either thermos style or flask/mug. Love ours. 10+ years and not found better. Coffee still warm after 15+hours should you catastrophically forget to drink it.

I have thought about this topic too much, but if I were to give you the TL;DR version of previous posts on this:

• Nearly all mugs will keep coffee hot, usually too hot if you're drinking straight out of the spout, so this is almost never a concern
• By contrast, the #1 concern is the lid, if you're drinking straight out of the mug. A large lip on the lid will give you some critical runway to cool the coffee down, lest your tongue and palate end up burnt meat.
• How much tolerance you have to how much effort is to clean come into play also. I have no patience for the Zojirushi lid's multiple pieces you have to take apart; other people are fine with it.

There have been too few reviews on the Kinto, but for me, combination of great looks, comfortable drinking lid with plenty of lip, easy to clean, this is the epitome: https://kinto-usa.com/collections/tumblers/products/20941?variant=22206320967728 Unfortunately, again, wish there were a few more reviews

I use a zojirushi and a hydro flask. If you're looking for a great seal, the zojirushi is the way to go

Zojirushi is the king of thermal. Material-wise, I don't know of any that is more "pure" (metal/cermaic, no plastic drinking lid) than Fellow's though

Just recommend keeping the lid off on the Zojirushi for a bit after brewing if you have the chance. Otherwise it'll probably still be too hot to drink even after an hour or two

Contigo steel travel mug. I put ice into it at 10 PM, let it sit overnight, and then had it in a hot car until 4PM while I went to an air show. There was still ice in it. I use it for both cold and hot liquids and it's absolutely amazing

How much volume do you need?

Zojirushi

Yeti tumbler 30oz

Zojorushi makes a ton of truly excellent relatively inexpensive travel mugs that come in a bunch of different colors.

I like that the lid locks, the spring action on the lid is very effective, it's built like a rock, and it keeps coffee hot for days (literally if you leave it full).

A third vote for the Zojirushi. Got mine for Father's day and have been using it daily since.

I have a Zojirushi, it’s great and vacuum seals so it’s spill proof! I’ll try to link it.

https://www.zojirushi.com/app/product/smkc

They also sell replacement gaskets, etc. individually which is really helpful.

Its not as fancy, but I love my Contigo.

I have a Zojirushi and absolutely love it. The leak proof lid locks, so even throwing it into a backpack/back seat is safe. The only con for me is that my coffee/tea stays super hot for a long time, so I have to let it cool before putting the lid on and leaving.

Love my 12 oz Sttoke commuter mug. It's ceramic lined and has held up well for me. It's part of my office setup with an AeroPress that I use every workday.

Following.

Yeti is the perfect size but not ceramic lined.

Use a prismo and it works on any mug

Would the SimpleModern mugs work?

Nova Ceramics makes very pretty travel mugs. They’re hand made ceramic and surprisingly affordable.

Downsides are that it doesn’t hold heat toooooo well but I’m otherwise a fan.

Get solara vacuum insulated bottles, they have from 500 ml to 1.2 l variants. Water stays hot and cold as long as they claim.

Fellow carter

Don’t buy headway from rabitat