My thermal flask test thread.

I gave you edit though I think. Either way, post the results here and I can add them in :)

Eurofighter said:
I don't really need a flask that much, I'm rarely away from a kettle for long. But it would be good to have some kind of cup for my car that can stay hot for a while. Does anyone have any recommendations.
Click to expand...

I have one that I will be testing on Thursday if all goes to plan (and I remember to start the test on time).
 
lltfdaniel said:
Yeah, in that spreadsheet will have to mention of what thermometer was used.

Just a change of mind, it is contradictory but forgive me, i don't mind at all anyways what i am doing is just a hobby.

@AndyCr15 controls that spreadsheet so you will have to ask him to publish results on it.
Click to expand...
Thanks, I'll do the test and then ask AndyCr15. If you want a link to the Thermapen 4, I bought mine from Amazon. Last 6 colours are the ones to go for as the price is £51.60, the other colours are £64.80. Amazing bit of kit, so quick and accurate!

https://www.amazon.co.uk/gp/product/B07NDBXM4H/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&th=1

If you would prefer to pay less, there's the Thermapen Classic which is £36 for three of the colours.

https://www.amazon.co.uk/ETI-SuperF...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
 
AndyCr15 said:
I gave you edit though I think. Either way, post the results here and I can add them in :)



I have one that I will be testing on Thursday if all goes to plan (and I remember to start the test on time).
Click to expand...

I am rubbish with spreadsheets Andy, i need to add a new column specifying what thermometer was used.

Edit,

Thanks Andy!
 
I will retest the sigg and tkpro because of the starting temperature.

I did a stupid newbie mistake, with the ThermoPro TP02S i did not remove the cover so that explains the starting temperature of 93c and 97c.

The only ones i would trust is the ones i am testing in the freezer, so i apologise.

83501672_10157926802052375_5507638019101818880_o.jpg
82527722_10157926802142375_3745393661739794432_o.jpg


I have deleted the rows in the spreadsheet and will retest them tomorrow.
 
Last edited:
I just dug my 1.2L flask out, fully filled with boiling water to preheat it, then emptied and filled with boiling water again. Ill see what temp I've got at 3.10am, I'll probably still be up. :p Only £15, not expecting amazing temperature maintenance but its certainly kept my water hot enough for a few hours when I've used it.

20200121-211058.jpg


20200121-210930.jpg
 
Merlin5 said:
I just dug my 1.2L flask out, fully filled with boiling water to preheat it, then emptied and filled with boiling water again. Ill see what temp I've got at 3.10am, I'll probably still be up. :p Only £15, not expecting amazing temperature maintenance but its certainly kept my water hot enough for a few hours when I've used it.

20200121-211058.jpg


20200121-210930.jpg
Click to expand...

I start mine ideally in the morning, i will be finished around midnight.

This has ultimately backed me up about the 97c starting temperature, thank you, nice to see my cheapo thermometer gave the same exact reading there...

Nice to have you onboard.

Dan.
 
lltfdaniel said:
I start mine ideally in the morning, i will be finished around midnight.

This has ultimately backed me up about the 97c starting temperature, thank you, nice to see my cheapo thermometer gave the same exact reading there...

Nice to have you onboard.

Dan.
Click to expand...

Glad to be of help. :)

Well I missed my 6 and 12 hour deadlines and will do the test again on Friday.

Instead of checking after 6 hours at 3.10am, it was 7.5 hours later at 4.40am before I got back to the flask which gave me 79c. Then I got back to it again at 9.40am which was 12.5 hours since the start and showing 70c. So when I get temps at exactly 6 and 12 hours I anticipate about 82/3c and 71/2c.

The water still felt very hot to the touch at 9.40am, and it looks like a cheap flask like mine is keeping similar temps to between the Stanley and the Ultimate flask.
 
Last edited:
Merlin5 said:
Well I missed my 6 and 12 hour deadlines and will do the test again on Friday.

Instead of checking after 6 hours at 3.10am, it was 7.5 hours later at 4.40am before I got back to the flask which gave me 79c. Then I got back to it again at 9.40am which was 12.5 hours since the start and showing 70c. So when I get temps at exactly 6 and 12 hours I anticipate about 82/3c and 71/2c.

The water still felt very hot to the touch at 9.40am, and it looks like a cheap flask like mine is keeping similar temps to between the Stanley and the Ultimate flask.
Click to expand...
In such vital experiments to benefit a humankind, such amateurism shall not be tolerated :mad:
 
(Since you do pre-heat in real life, definitely think that was worthwhile
- the radiation versus conduction heat losses in the different flasks may be different at higher initial temperature.)

In real life, you also take some cups out of the flask during the day, and the remaining liquid in the flask will, then, have acclerated heat loss,
so I'm wondering, if you should do that too ...... is the final cup palatable
 
jpaul said:
(Since you do pre-heat in real life, definitely think that was worthwhile
- the radiation versus conduction heat losses in the different flasks may be different at higher initial temperature.)

In real life, you also take some cups out of the flask during the day, and the remaining liquid in the flask will, then, have acclerated heat loss,
so I'm wondering, if you should do that too ...... is the final cup palatable
Click to expand...

As I've said before, personally I would say we shouldn't. More complicated, more variables, more chance for borked results.

I'm not sure why everyone wants 'real world's results. Surely we just need to know which maintains temperature best? Do we really think one will perform better in a test where cups are taken and then perform worse in one they are left closed, compared to other flasks? Surely the performance will be the same? The only reason for real world would be to know what actual temperature it might be after 12 hours, no?
 
AndyCr15 said:
As I've said before, personally I would say we shouldn't. More complicated, more variables, more chance for borked results.

I'm not sure why everyone wants 'real world's results. Surely we just need to know which maintains temperature best? Do we really think one will perform better in a test where cups are taken and then perform worse in one they are left closed, compared to other flasks? Surely the performance will be the same? The only reason for real world would be to know what actual temperature it might be after 12 hours, no?
Click to expand...

This is how i casually take it as well Andy, i agree with what you have said, it gives us a good indication i think with how well it maintains the temperature and to give an idea of different variables.
 
Last edited:
The thermos ultimate 900ml is the one i whole heartily recommend to anyone why well it is smaller in size ( smallest when compared to all of my other flasks) being 900 ml or 500ml whichever you pick and does not cost a bomb for a decent flask and yeah decent heat retention up to the 12 hour mark.

The other alternative is the Stanley legendary classic.

I will test the Yeti flask bottle it is on the spreadsheet and apparently people rave about the yeti and or hyped and is popular from what i have found out, i will find out when i test the Yeti.

I would love to test more flasks but it is getting to a point where i have enough due to the folks here hah.

I would love to have tested the esbit flasks first hand but what i like about esbit is that they have tested their thermal bottles like in the extact same manner as me so i guess i do not have to bother.

Their website is > https://esbit.de/

Nice to have a manufacturer to report the actual temperatures when it is 6h from starting temperature etc instead of saying hot up to 6,12,24 hr etc.

83611853_10157935159602375_7123790803352158208_o.jpg


zojirushi also test their bottles the same as well,

https://www.zojirushi.com/app/product/sjjs scroll down and you will see.

83360724_10157935178057375_1528307710771068928_o.jpg



Dan.
 
Last edited:
Well my results are in. Not too shabby for a cheap double walled flask. Interesting how it lost 15c in the first 6 hours and only 10c in the final 6 hours. AndyCr15, would you be so kind as to publish my data into the spreadsheet. Thanks. :)

Product: Mountain Warehouse Food Flask
Size: 1.2L
Price: £14.99
Link:
https://www.amazon.co.uk/Mountain-W...ehouse+flask&qid=1579888650&s=clothing&sr=8-7
Tested By: Merlin5
Pre-Warmed: Yes
Starting: 98c
6hrs: 83c
12hrs: 73c
Thermometer Used: Thermapen 4 Pro
Conditions: Room temperature (17-20c)
 
You must log in or register to reply here.
Back
Top Bottom