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My thermal flask test thread.

Discussion in 'General Discussion' started by lltfdaniel, Jan 17, 2020.

  1. moon man

    Mobster

    Joined: Nov 17, 2003

    Posts: 2,731

    Location: St Breward Cornwall

    looks a great flask with a very useful capacity ,some people have said very long heat retention times are not useful in the real world but in my world i have very long days out that may turn into wild camping in the summer ,when we moved to cornwall we had to sleep in the car on house hunting trips in the winter and just pay for the odd campsite (was moving down without a job looking to buy for cash from the yorkshire house sale but only just affording the lowest priced properties} so again a flask was a great help
     
  2. ANDARIAL

    Soldato

    Joined: Oct 19, 2002

    Posts: 6,146

    Location: Woolyback Country

    I had one of those many years ago,huge capacity it was
    Sadly i found it crap Coffee,no milk,preheated and by dinnertime the coffee was cold :(
    How do you find it ?
    Was over 20 years ago,have they got better?
     
  3. moon man

    Mobster

    Joined: Nov 17, 2003

    Posts: 2,731

    Location: St Breward Cornwall

    It's amazing, very hot all day long, I'm using it now down in Newquay,, lifetime guarantee, don't even need to preheat milk, love it
     
  4. moon man

    Mobster

    Joined: Nov 17, 2003

    Posts: 2,731

    Location: St Breward Cornwall

    Also I believe some large flasks can't be supported just at the neck so have supports that bridge the vacuum and can lose efficiency
     
  5. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    1+

    My Stanley classic legend also was nice and hot,

    At the 12 hour mark it is hot enough to burn your lip (so it is just like boiling water straight from the kettle) despite fewer c when first put in until 12 hours.

    Dan.
     
    Last edited: Jan 20, 2020
  6. Skillmister

    Capodecina

    Joined: Oct 3, 2009

    Posts: 19,506

    Location: Wales

    Please do the tests in the fridge and freezer.

    I need a decent flask so will be keeping an eye on this
     
  7. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    If i can find space in the freezer or fridge or the alternative is leaving the flask outside, instead of the fridge but not the freezer.

    Also, i will test the flask up to the 12 hour mark, not 24, because for most people 12 hours is ample time for most people as have said and still give you an idea.

    When i am ready i will let you know, i will be doing another test indeed, also i will be this time preheating the flask from the start, by filling up fully with boiling water and leave it for at least 2 minutes, then drain and then put boiling water in it again and then start the test.

    I will be testing 1 flask which is the Stanley master vacuum bottle 1.3l with quadvac.

    If i can find room in the freezer i will let you know and conduct the test in the freezer.

    So yea every 6 hours i will check the temperature also i will be using a different thermometer.

    Dan.
     
    Last edited: Jan 20, 2020
  8. ANDARIAL

    Soldato

    Joined: Oct 19, 2002

    Posts: 6,146

    Location: Woolyback Country

    That was the one i had,must have been/gotten faulty
    Interesting thread :)
     
  9. Skillmister

    Capodecina

    Joined: Oct 3, 2009

    Posts: 19,506

    Location: Wales

    Great stuff. I was out hiking for 5 hours in sub zero yesterday morning and need a flask I can rely on in those conditions
     
  10. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    In comparison to my other tests right, which i did without preheat and leaving them in a room with a temperature of 18c, i will have to test the stanley master 1.3 litre bottle in that condition which is testing it without preheat and in the same temperature conditions so to get a rough idea of how good the heat retention is in comparison to the other flasks that were tested, yea may seem unfair because apparently the more hot fluid the more it will stay hotter.

    If i think the Stanley master quad vac is any good and is the best i am considering giving my other thermal flasks away, friends family or people on this thread.

    As well as testing the flask outside and in the freezer.

    Dan.
     
    Last edited: Jan 20, 2020
  11. jpaul

    Sgarrista

    Joined: Mar 1, 2010

    Posts: 9,553

    they have a bigger surface area though ... ideally the'd be spherical ?

    metal flasks are definitely harder to maintain than glasss too, for daily use; look at the grim earlier picture, for glass you can use babys bottle tablets/bicarb ..
    and remove that tomato soup tang.
     
  12. AndyCr15

    Capodecina

    Joined: Apr 28, 2011

    Posts: 10,182

    Location: London, UK

    I like this, as it makes them easier to test and as you say, is plenty long enough. I have the thermometer, but I don't think I have the dedication to cut my sleep short to measure temps though :) 12 hours means I can test the two items I have on my day off.
     
  13. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    Let me know what you think about that thermometer, also make sure you leave it in the liquid for at least 10-15 seconds for it to give a correct reading.

    Nice to have you on board.

    Dan.
     
  14. AndyCr15

    Capodecina

    Joined: Apr 28, 2011

    Posts: 10,182

    Location: London, UK

    Will do. I have a Chilly's to test and a insulated travel mug to try too. Are there any other branded flasks needed doing?
     
  15. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    The 2 top brands i know of personally is Stanley and Thermos and possibly the Zojirushi brand as well and or whatever brand the people here would bring up like the tartan flasks that were mentioned on this thread.

    Anyways the more brands we test the more we will know any how, so it is like busting the myth and the more comes to light the better with the results for example the chilly flask you will test.

    We will be using this > https://docs.google.com/spreadsheets/d/1r0ZEVhnXF97QpugLyveziQB0vIAPz8T1bz6sRLTNlUE/edit#gid=0

    We will have to state the testing conditions like if the flask was pre heated or not or what the room temperature or temperature is etc,

    Dan.
     
    Last edited: Jan 20, 2020
  16. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    -
     
    Last edited: Jan 20, 2020
  17. Pho

    Sgarrista

    Joined: Oct 18, 2002

    Posts: 8,990

    Location: Derbyshire

    I was thinking about getting a flask to put in the car which I can swig on using one hand whilst driving stopping, turning the engine off, and fully engaging the handbrake.

    Has anyone tried a Thermos Direct Flask? Apparently keeps warm for 10 hours.
     
  18. Merlin5

    Capodecina

    Joined: Aug 17, 2009

    Posts: 14,781

    Location: Finchley Central, London

    I've got a Thermapen 4 (fastest and best thermometer in the world) and a 1.2 litre flask. Are they ok for the test?
     
  19. Eurofighter

    Wise Guy

    Joined: Mar 20, 2014

    Posts: 1,498

    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.
     
  20. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,195

    Location: Bournemouth

    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.
     
    Last edited: Jan 21, 2020