Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold

This is an excellent Thermos. I’m just back from Antarctica with temps in the -20’s and -30’s. This flask kept my coffee warm, and it was great to have a drink of hot coffee on my breaks up Vinson. One thing I would change is I would go for the smaller size.

I haven't had the opportunity to keep anything cold in this Thermos yet, but I can say it definitely keeps my tea hot 24 hrs. I pre-heat it for about 10-20 mins before filling with hot tea, and it keeps it steaming hot 24 hours. It could possibly keep it hot longer, but I usually drink the last cup right at 24 hours after filling.

I love itHelps me to keep on drinking hot tea all day long

Great product for outdoors use. Have used it for snow shoeing, mountaineering and ice climbing. Very light weight for a vacuum thermos. 13.6 oz vs 10.9 for 1L Nalgene + OR water bottle parka. Keeps liquids hot all day in freezing conditions. Heat retention is far superior to my Hydro Flask in the freezing conditions.

High quality and works as described. thank you

I received a unit this afternoon. When I took the instruction inside out of the thermos and shook the bottle I can hear some noise like a small piece of metal is moving up and down with the shaking motion. I’ll request a new unit in case it’s broken.

The rubber gaskets that make the seal come off easily. I lost the rubber seal and now I can’t get a replacement because this thermos is discontinued. It leaks all over the place. I’ve had this less than one year and paid $50. I contacted Thermos and all they did was send a link to buy another product because they claim to not have the part. Don’t make the mistake I did and waste your money.