Thermos Stainless King Red Flask - 1.2L
946/3019Ā£28.00
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About this product
The Stainless King series blends modern technology with a dash of the past, providing reliable products that stand up to the demands of everyday life. Ideal for transporting hot and cold drinks for picnics with friends and family, this large 1.2L Thermos flask features a stainless steel interior and exterior making it cool to touch when filled with hot liquid and sweat-proof when filled with cold liquid. It features Thermos vacuum insulation technology, keeping liquids hot or cold for 24 hours.
Twist and pour stopper lets you pour without removing the stopper.
Insulated stainless steel serving cup.
- 1200 ml capacity.
- Stainless steel.
- Keeps cold for 24hrs and keeps hot for 24hrs.
- Comes with 1 cup.
- Vacuum insulated.
- Twist and pour stopper.
- Manufacturer's 5 year guarantee.
- EAN: 5010576924445.
4.8
335 reviews
98%
Recommended this product
Customers Say
Highly praised Thermos flask for excellent heat retention up to 24 hours, sturdy build, and practical design. Some note handle design issues and size limitations for food use.
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.
Keeps hot all day.
Bought several of these over the years, they hold a lot, stays hot all day when at working, would recommend, great value for money.
Su, 55 - 64
Ms
Bought 2 big ones for hot water and 2 for food in December 2025 and it's efficiency is 100% but you have to put hot water first before putting your porridge and it can last overnight and the temperature will still be hot (without milk ofcourse). The food ones are quite small, the image is misleading.
Shoppagirl, 35 - 44
Well worth buying
Looks great, keeps the tea very warm all day, no mess when pouring, and robust.
John, 55 - 64
Good
"I am extremely satisfied with my purchase. The product is of excellent and very reliable quality
Suhag
Does its job well
Pricey but worth it..keeps my drink hot for a good 8 hours..thermos is a proven brand and worth the extra few quid..would recommend
Col, 55 - 64
Only the best will do šŖš¼
Really happy with my new Thermos flask. Only the best will do šŖš¼
Rhino, 45 - 54
Excellent purchase
Excellent temperature retention and looks good too.
Red hot
Temperature
Excellent buy. Tea/coffee always piping hot
Scooby, 65 or over, Scotland
Great
I bought this for my husband in hospital it's fantastic
Belle, 65 or over, Belfast
Great product
I bought it this month and it is a very good product.
Christabelle22, 25 - 34, Stockport
Hello Keith,
I can advise the following for the Thermos Stainless King Red Flask - 1.2L:
Dimensions: 9.5 x 10.5 x 31.0cm
Weight: 670g
Thanks for using Q & A.
Hello NonnaBillie,
The Thermos Stainless King Red Flask - 1.2L can keep liquids hot for up to 24 hours. There is no heating element, so it's the insulation that retains the heat and the heat will decrease when opened.
Thanks for using Q&A
Hello Mac,
The supplier has advised the following for the Thermos Stainless King Red Flask - 1.2L:
"It is approximately 20mls."
Thank you for using Q&A.
Hi Bodger,
The dimensions are as follows:
H: 32.4cm
L 11cm
W 10cm
Thanks for using Q&A.
Hi Mandy
The information we have is the Thermos flask features a stainless steel interior and exterior making it cool to touch when filled with hot liquid. making the exterior surfaces cool or cold.
Hope this helps
Thanks for using Q&A
Allan
Hello ALM,
From the information we have available I can confirm this Thermos Stainless King Red Flask is suitable for keeping milk warm for upto 24hrs. You can also use the flask for cold drinks.
Thank you for using Q&A
According to label on mine
5 year guarantee
Dishwasher safe
BPA Free
Leak proof when closed
Hello Pandahero,
I can advise the following for the Thermos Stainless King Red Flask - 1.2L:
Apologies, this is a hand wash only item.
Thanks for using Q&A.
Hello Cee,
After checking with our supplier, they have advised for the Thermos Stainless King Red Flask - 1.2L: The width of the King 1.2L flask neck is approx 4cms.
Hope this helps.
Thank you for using Q & A.
Hi Terry
Re: Thermos Stainless King Red Flask - 1.2L 946/3019
The King series plastic cups are BPA free
Thanks for using Q & A
Hello Jay,
After checking with our supplier they have advised for the Thermos Stainless King Red Flask - 1.2L 946/3019: the flask will not leak laid on its side although we always ask to keep the flask upright. Please make sure the stopper is on tight.
Hope this helps.
Thanks for using Q&A.
The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers youāll see above are submitted independently. As we donāt review these answers, we canāt 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.