Thermos Mondial Flask - 1.8L
943/3245£18.00
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About this product
Keep everyone refreshed with this large 1.8 ls Thermos Mondial flask - it holds enough for 8 generous cups, so there's plenty to go around whether you're at work, out on a picnic, or heading off on an outdoor adventure. The twist and pour stopper lets you serve up drinks without removing it, and there's even a handy stash compartment built in for storing tea bags or sugar. With 2 cups included, you're ready to share hot brews or cold drinks straight away.
Built with a glass lined vacuum interior for serious temperature performance, this flask keeps hot drinks steaming for up to 12 hours and cold drinks chilled for 24 hours. The durable plastic exterior wipes clean easily after muddy hikes or sandy beach trips. That 1800ml capacity means fewer refills and more time enjoying the outdoors, while the twist and pour design makes serving simple and mess free. Covered by a one year manufacturer's guarantee for peace of mind.
- 1800 ml capacity.
- Glass.
- Keeps cold for 24hrs and keeps hot for 12hrs.
- Comes with 2 cups.
- Twist and pour stopper.
- Manufacturer's 1 year guarantee.
- EAN: 5010576848864.
4.4
437 reviews
86%
Recommended this product
Customers Say
Well-insulated, large capacity flask that keeps drinks hot for up to 24 hours. Durable design with included cups, ideal for travel, camping, and picnics. Fragile glass liner noted as a downside.
An AI generated summary based on recent customer reviews
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Great insulation - all day!
Really good insulation.. boiling water in the morning for camping is still hot enough to make tea or pot noodles in evening.. great for trips out where you can make your own tea or coffee out and about
Ed, 35 - 44
So good we bought it twice
Replacement for a broken flask
Richard, 65 or over
Excellent buy!
I bought this in November 2025 and it has been serving its purpose exceptionally well. The hot and cold insulation lasts as long as 24 hours. The size, is perfect for purpose. And it is easy to carry around in the bag as it is not heavy. It’s used for store both hot tea as well as water. It’s easy to clean and I’m sure it will last longer than it has so far. I will definitely recommend!
BDic, 25 - 34
Great value
Kept the water nice and hot for hours Decent price . Would recommend
Hot drink 69, 45 - 54
Insulation
Keep hot water hot for about 24 hours
Ivy
Temperature that travels
A sturdy, well-insulated, and versatile flask that keeps drinks hot, making it ideal for travel, picnics, or to take with your packed lunch.
Ali
Flask
Absolutely brilliant my husband loves it
Sunny
Vacuum flask
I brought this flask to replace my broken one which I had many years same make and model but the new one is not built to the same specifications, it is very thin plastic cups are flimsy and the stopper doesn’t feel very good I suppose it’s a sign of the times
Joy, 65 or over
Keeps water hot
Keeps water hot, hold enough for two
Daisy, 45 - 54
Disappointed
I’m a bit disappointed by this purchase as the glass smashed in the flask, this was not knocked over and was secured.
Robbo20
Hello Dizzyd,
The supplier has advised the following for the Thermos Mondial Flask - 1.8L:
“ With cups - approx 38cm
Without - approx 34cm. ”
Thanks for using Q & A.
Hi Priya,
Yes, you can put hot milk in the Thermos Mondial Flask - 1.8L. However, it’s important to note that milk can spoil if left at warm temperatures for too long. To ensure safety and freshness, it’s best to consume the hot milk within 4-6 hours.
Thank you for using Q&A
Hello Gus,
The supplier has advised the following for the Thermos Mondial Flask - 1.8L:
The length of time a flask will stay hot is dependent on many factors and the process you take prior to filling it. For longer heat retention, flasks need to be preheated with boiling water for at least 5 minutes. You’d pour this water away and then the liquid you wish to keep in it must be quickly poured in piping hot immediately after, ideally from a microwave or kettle. Please note that adding cold milk for tea or coffee will quickly reduce the temperature. The flask should also be filled to the right up so as to ensure there's minimum air space.
As soon as it is then opened, it will cool as cold air will then get in. This shouldn’t be an issue if you use all of the contents upon the first opening. If not, you’ll find that, each time it is opened, it will be a little cooler.
The ambient temperature during the time the flask is still sealed will affect the performance too; very cold air at the location you're keeping it in will cause it to cool sooner.
Because of these factors, it is impossible for us to guarantee a specific temperature, or be exact on how long it’ll remain hot for. Also, unless you’re referring to the water being freshly boiled and poured straight in, it’d depend how hot the water is when it first goes in. Typically, boiling water when poured in will have a temperature of around 90 degrees or so. If left unopened, a Flask advising “Hot for 24 hours” would typically be around 45-50 degrees after this period if all the processes above were followed, but much depends on the ambient environment.
Thank you for using Q&A.
Hi Wills
This Thermos Mondial Flask - 1.8L comes with 2 cups and hold 8 cups.
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Diane
Hi Jc,
Yes this will keep drinks cold for 24hrs and keep them hot for 12hrs.
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Hello Sah,
The supplier has advised the following for the Thermos Mondial Flask:
"Mondial flasks are made from borosilicate glass and are lead and BOA free. There’s no stainless steel components in the Mondial Flask, but in our other stainless steel products we only use 18/8 food grade stainless steel."
I hope this helps.
Thank you for using Q&A.
Hello Emz,
I can advise the following for the Thermos Mondial Flask - 1.8L:
Apologies, this is hand wash only.
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Hello Serendipity,
The supplier has advised the following for the Thermos Mondial Flask - 1.8L:
“ Yes you can pour boiling water into the Mondial flask but please see the Use and Care Guide. ”
Thanks for using Q&A.
Hello Chris,
The supplier has advised the following for the Thermos Mondial Flask - 1.8L:
“ The lid has a compartment for teabags or sugar but it cannot be used for liquids as it will leak. ”
Thanks for using Q&A.
Hi Bigmac,
This is 38cm in height.
Thanks for using Q&A,
The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.