1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

My thermal flask test thread.

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

  1. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

  2. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    24 hrs in,

    1. thermos ultimate - 65 c
    2.stanley classic legend - 63c
    3. sigg hot and cold -60 c
    4. klean kanteen tk pro - 56c
     
  3. bainbridge

    Mobster

    Joined: Dec 9, 2009

    Posts: 3,304

    Location: Bristol

    That's great Dan but these aren't real life results. Who would use a flask at home in 18c when there's access to hot water anyway?

    How about conducting the tests again but storing the flasks outside, maybe each one in some sort of bag to replicate outdoors people out and about with a rucksack?
     
  4. David Flett

    Wise Guy

    Joined: Dec 14, 2017

    Posts: 1,383

    Location: Aberdeenshire

    And maybe add a dash of milk to each as most folks do. I've been following this thread all weekend now I'm thinking I could do with a flask to take fishing with me. Good dedication staying up late and getting up early in the name of this tests:D
     
  5. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    No problem, was a bit worried i would not be awake to take the 18 hour test results.

    I think my thermometer is a bit meh, i need a professional one so will be looking at google results for one,

    Dan.
     
  6. thenewoc

    Soldato

    Joined: Mar 9, 2012

    Posts: 5,323

    Location: West Sussex, England

  7. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    Yea i am up for doing more tests and yes any suggestions for testing is welcome.

    I am currently looking at 'professional thermometers' or any suggestion from you folks because i need a proper one i think.

    I feel that cheap thermometer i used didn't do full justice, not to worry because i can test these again using a proper thermometer and test it outside in a bag as @bainbridge said,

    Also a dash of milk test after that, i am roughly thinking 125ml of milk.
     
  8. thenewoc

    Soldato

    Joined: Mar 9, 2012

    Posts: 5,323

    Location: West Sussex, England

    Also does pre warming make any difference?
     
  9. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    Apparently so yea.
     
  10. bazzabear

    Wise Guy

    Joined: Nov 2, 2013

    Posts: 2,164

    So have we reached a conclusion? What am I best buying to store two cups of coffee and a choc ice?
     
  11. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    To the best of my knowledge a 500ml flask will suffice for 2 cups of coffee me thinks so 250ml in each cup, should be enough, also do you intend to add milk with the coffee in the flask?

    Do you want the flask to have a cup or not or will you use a separate cup?

    I don't know what would be the best but if you want a good start in the world of thermal flasks the thermos ultimate 500ml flask definitely will be a good start so i would point you towards that.

    My 2 pence,

    Dan.
     
  12. AndyCr15

    Capodecina

    Joined: Apr 28, 2011

    Posts: 10,006

    Location: London, UK

    I personally think you're introducing too many variables. I also personally don't think you need a 'real world test', you just need a test of which is best at keeping something warm. I would think it is unlikely that whatever is best at insulating in lab conditions, then does worse in real life conditions.

    With the more variables, you can't then keep testing new flasks. Today is very cold, put it outside for 24 hours will have a very different result to a different flask tested in March, April or May perhaps (or even just next week if it warms up a little)

    Results thus far are updated in THIS GOOGLE SHEET.
     
  13. Blackjack Davy

    Mobster

    Joined: Aug 16, 2009

    Posts: 3,236

    Never actually sawed one in half myself but I've found no discernable difference between a glass flask and a stainless in terms of keeping their contents hot, and I believe its down to the thickness of the metal as to whether it distorts due to atmospheric pressure on the vacuum... again none discernable.

    n.b. personally I've never bothered to check whether any of them are still hot after 24hrs because a) I've never been away from a source of hot water for that length of time and b) who would want to drink tea thats been stewing for 24hrs anyhow...
     
  14. moon man

    Mobster

    Joined: Nov 17, 2003

    Posts: 2,628

    Location: St Breward Cornwall

    been giving mine another run out to crantock today ,dont see the point in paying good money to cafes


    [​IMG]
     
  15. lltfdaniel

    Wise Guy

    Joined: Feb 23, 2009

    Posts: 2,194

    Location: Bournemouth

    In my quest for a thermal flask to give the best heat retention,

    I have decided to buy one of these > https://www.outdoorwales.net/stanley-master-vacuum-bottle-14qt13l.ir

    Why well because it uses quadvac.

    From https://www.stanley-pmi.com/blogs/t...rand-introduces-master-series-for-spring-2017

    QuadVac™ adds a double layer barrier to the double wall vacuum insulation, locking in heat or cold better than any other technology currently available. The four layers offer protection from convective, conductive and radiant energy transfer creating the highest thermal retention rates. To create the most durable bottle, Stanley Master Series uses 1.0mm thick stainless steel, compared to the industry standard 0.6mm, making Stanley’s construction 50 to 100 percent thicker than others on the market.

    It is rather expensive but i have confidence this will be the best flask in my inventory, until i find out by testing it.

    Dan.
     
  16. thenewoc

    Soldato

    Joined: Mar 9, 2012

    Posts: 5,323

    Location: West Sussex, England

  17. NoobCannon

    Mobster

    Joined: Jun 13, 2011

    Posts: 4,964


    Its even ethernet enabled apparantly. What more could you ask for


    “Description
    Thanks to its layer of foam Ethernet-enabled between two layers of polyester”

    also @op. You really need to look no further than this

    [​IMG]
    https://www.1stdibs.co.uk/furniture...VB7LtCh26xALzEAQYAiABEgJrvvD_BwE&gclsrc=aw.ds
     
  18. Clov!s

    Capodecina

    Joined: Dec 1, 2011

    Posts: 17,683

    Location:

    I have one of these, keeps my milk cold at work fine enough over a 12 hour day.

    Also filled it with a freshly boiled kettle at 8pm and it was still steaming when I took the lid off at 5am.

    HYDRATE Super Insulated Stainless Steel Water Bottle - BPA Free, Vacuum Flask - 24 Hours Cold & 12 Hours Hot (500ML, Carbon Black) https://www.amazon.co.uk/dp/B01MXLU30C/ref=cm_sw_r_cp_api_i_9JnjEbKRQN3JK
     
  19. thenewoc

    Soldato

    Joined: Mar 9, 2012

    Posts: 5,323

    Location: West Sussex, England

    Those are crying out for a redesigned lid that you can sip out of without taking the thing off. As it is it looks as though if you were drinking out of it in the copious amounts of space you get these days on public transport in rush hour, you'd loose most of your front teeth from some ***** jogging you.
     
  20. jpaul

    Sgarrista

    Joined: Mar 1, 2010

    Posts: 9,125

    ... so why does thickness help ... or that's the drop test ? without their explanation as to why that improves heat retention it isn't a compelling marketting message, better quality vacuum ?

    you don't leave the tea-leafs in the flask ... but there again I usually carry coffee ( more motivational hit) , either, brewed in a tea-pot or filter machine;
    definitely not sugar, in either, too cloying.