keep 24 hour hot and very robust
925271
Perfect for keeping hot liquid. The product description on Amazon says 12 hours for hot, but the product itself says 24 hours, and the product is right. I rinsed it with boiling water and then filled it with boiling water. After 24 hours the water is still hot that I can only drink slowly (of coz it's not boiling temperature any more).

I also like the inner lock which doesn't use springs. I had those with springs before, and after some time the springs got broken and I had to throw them away. This one without springs seems really "unbreakable".

My only complain about the one I got is that it seemed to get punched on something before reaching me and the cap has a small dent.
4795517
Excellent flask it holds the temperature for long, even more than 24 hrs
1842097
I own two of these, one in this "red" color which in all honesty is more bright pink and one in black.  They are one of the best travel mugs/containers I have ever used.  Will keep hot beverages hot for hours and warm for 11-14 hours in total.  I cannot recommend enough.
3628911
I made coffe at 5AM at 2PM it was STILL warm. Love that its leak proof too.
4306259
Bought this for my husband to use in his big rig. Works great and can maintain a comfortable 76 degrees even in July in south Texas. It does need a 2000W inverter to run and you need a generator or shore power because it is a big draw on the batteries. Drain pan fills quickly in high humidity situations, about every 14 hours you need to empty it if you are not draining to the outside. It is a little bulkier than I was hoping, but not very heavy. It isn't any louder than a window unit. Make sure vent windows are open or place a screen in one of the cab windows to keep good airflow for the unit.
3421997
Nice. Built like a tank. Stainless does not break like glass and keeps beverages hot. Use these when we travel. Fill with coffee at 8 a.m. and it's still hot at 6 p.m. Actually, it was still warm at 8 a.m. the next morning and warm-ish after that. But by 6 a.m. the second day, I needed to "touch it up" with some heat from a plug-in heating coil --but it still would have been drinkable after 48 hours even though just lukewarm.
3939014
Bought this at Walmart for $30 this morning. Would have opted for the larger version on Amazon to fully cover my back, but needed something today.  Pulled a muscle and it is really helping me. Goes up to heat setting 6, which gets very hot.  I like heat and wanted something that would almost burn me. I was satisfied when I had to turn it down to 5.
I wanted something that would stay on all day ( Most have an automatic 2 hour shut off....no thanks..). Press a button and this will stay on all day, press another and it will shut off in 2 hours. Best of both worlds.
2737242
I've used this tumbler for a couple of months and have been happy at its ability to maintain temperature and be leakproof throughout. I also appreciate the capacity of the larger sized version. "Preheating" the vessel by pouring in some hot water first appears to help the long-term temperature holding of your beverage.
904587
Although there are some negative feedback, I personally think it is great. It can keep water hot for more than 12 hours! Love it.
3527104
This bad boy really DOES keep things cold or hot ALL DAY LONG.  I put hot tea in mine at 7:30 going to work.  WHen I got home at 5:30 it was still hot.  WOW.
2852914
Very reliable product they have put out here.  They say it keeps liquids hot and cold for 24 hours.  Seems to me it lasts longer than that, possibly up to 48 hours depending on how hot or cold.  Highly durable as well; this thing takes punishment.  Very easy to clean.  It's a bit bulky but once you get used to it it pretty much pays for itself.  Would definitely purchase a second should my original one become overly damaged.

Five stars from me.
316934
I bought a Zojirushi America Corporation SM-JD36PA Tuff Mug on Oct. 31st, 2015, so I have had this thermos for about half a year and I am pleased to get it, especially I love its light pink color. I felt stomached after drinking cold water every time, so I realized that I need a thermos to keep drink hot. This thermos could keep drink hot for eight hours. I pour hot water in morning, and I also can drink warm water after eight hours. I had one thermos, but that one was too heavy to put in bags. Zojirushi thermos is 0.62 pounds that is convenient to have a picnic with it. There is another merit that the Zojirushi cup is well sealed. Some cups may leak and wet other stuff in my bags, but I have not met this kind of situation after using the cup yet. Once I put cool Sprite and ice cube into the cup, and it kept cool for a long time. Therefore, it keeps both cool and warm for at least 6 hours. I will update more when I use it in summer.

When I received the thermos, I was shocked about its direction since the direction would tell you how to clean your cup, how to assemble lid, and some cautions. Please read instruction carefully, otherwise it may cause sealing damage. From my experience, I waited about 3 hours to take a sip because I poured so hot water into the cup. Also, steam condenses into drops of water. When I open the lid, several drops of water would drop out of the lid. Further more, it is not an easy to clean this thermos completely. No matter how I clean the cup with using different dish soap, it always smells weird. Therefore, I recommend cleaning it only with water.

I strongly recommend this Zojirushi America Corporation SM-JD36PA Tuff Mug to students, coffee drinkers and those who need or prefer hot water in winters. This cups is well sealed, heat preservation, and easily wash up. However, please be careful when you would like to take a sip, but you pour extremely hot water into the cup before.
1692314
Lovin' this mug. Had another Thermax that kept things warm for an hour or two (not bad), but the top popped in so potential spills were always lurking and the rubber seals had started to disintegrate. Started searching under Thermax and got about a dozen hits or more. Reduced it to those that would hold 14 ounces and the list dwindled to about four or five. Read the reviews for this one and decided to give it a try. Best decision since drop-kicking the diet. This mug keeps my coffee hot for hours. No kidding. Hours. Not just one or two either -- it's still warm at noon; and not just luke-warm, but that perfect temperature that feels warm all the way down. If you've been dithering, stop and buy this one. Wish I'd retired the old one sooner.
678206
I really enjoy this thermos.  Drinks stay hot for four hours and it's leak proof. Take it to work each day.  Easy to clean.  Best thermos I've had.
2054442
They do a very good job of keeping hot drinks hot for hours. I'm sensitive to a weird taste when coffee is kept in stainless, and I didn't want to have to baby a glass Thermos. Their fat shape prevents using them in most car beverage holders, but does keep them from turning over on desks, etc. I should say that the reason I've purchased these several times is that I lose them at work.

My only complaint with them is that the top looks leakproof but isn't.
1645900
Hold temperature well for 2 liters. Built to last and handle the stresses of everyday carry from and to work.
1674711
I use this mug every day and it's a marvel, Works better than a chilled mug on a hot day because the rate of heat transfer is reduced.  Ice stays frozen in the mug for several hours at room temperature.  Ice stays frozen up to 24 hours in this mug if left in a fridge or chilled picnic cooler.  The mug is beautiful to look at as well, catching light from multiple glass surfaces.  The finish is smooth and consistent.  Dishwasher safe, but definitely NOT unbreakable.  The product should be handled by adults or older children only.  The glass is strong enough to handle boiling water or ice, but if you are likely to drop it or knock it over accidentally, you should order extras or just avoid this type of double-wall mug, and instead just use metal or plastic.  Not ideal for poolside use, where people are in bare feet and have wet, slippery hands, but I love it for cool drinks on hot days or for hot cocoa in winter, so I keep a few at home and occasionally take one in the car.