One of the best bits of kit I have used this year is also one of the cheapest, and surprisingly it comes not from any major outdoors brand, but Morrisons supermarket. This 350ml flask is, at £4, one of the best flask designs I have come across. 
The flask body is of conventional design. However, rather than using a separate cup, or a screw off lid, this has a simple to use flip up lid, which can easily be used one handed. To open it just press in on the spring loaded button and the lid flips open to reveal a white plastic mouthpiece. It has a large hole for fluid to come out and a small hole to allow air in, allowing a smooth flow of liquid.
Mouthpiece detail. The blue rubber seal is removeable for cleaning.
Closing it is simple, and again can be done one handed, and once the spring loaded clip has clicked closed you rotate a small plastic retaining clip upwards which prevents it from opening accidentally.
Detail of the spring loaded button and retaining clip which prevents accidental opening.
I use it with hot chocolate mainly, and find it best to pre-heat the flask with boiling water before putting my drink in, which helps keep the contents warmer for longer. A trip to Inverness on the train saw me still drinking the same cup hours later, still nice and warm.
Cleaning is simple, there are no hidden spots to retain excess liquids, except for behind the rubber seals which can be taken off for cleaning.
Robust, simple and cheap, get them while you can, as supermarkets seldom keep these things for long.
Weight: 240g
Height: 19.5cm
Diameter: 6.5cm
Colour: Red
The Airdrie Rambler 
What a fabulos item I have it in stainless steel. Given to me as a gift. Will use it everyday in this cold weather!
I bought this in stainless too and was so impressed that I went back and bought 3 more, for all the family. They are now a bit stained after continual use and if you’re out for the day I thought I’d buy yet more for that ‘second’ cup, but it seems Morrisons don’t have them anymore, do you know of any other suppliers (I would have purchased a lifetime supply if I’d known they would disappear)!
Hi Angela,
My local branch his stocks them regularly. Maybe you could ask customer services to source some for you?
Cheers,
Jim
They do have them occasionally – I watch out for them & get a few when I see them. My only niggle (after years of using them) is that they sometimes leak when you are drinking from them. I can’t work out why as it isn’t always the oldest ones & nor does it happen every time. I use them daily as a travel cup & agree they keep stuff warm for hours.
Just done as you suggested and they’ve got some! Hooray thank you for suggesting that, it hadn’t occurred to me😏 Going to stock up now……
Great stuff, happy to help!
Where can I get this flask morrisons seem to be out of stock
You could try asking at customer services, they might be able to get one in for you. Or you could try a different Morrison’s store as they are still on sale elsewhere.
Do you know anywhere I can get one of these flasks morrisons are out of stock
My local Morrisons is out of stock too, but I’m assured they haven’t dropped them and they will be back soon.
Lakeland do their version for £9.99 LINK
There’s also these ones on Amazon. LINK
I’ve just noticed that Morrisons now sell them online.
LINK HERE.