Making an International Standard Cup of Tea

  • Published on Apr 9, 2018
  • As far as I can find, no-one has actually made a International Standard Cup of Tea - ISO 3103 or BS 6008 - for the internet before. Lots of people have talked about it, but that's easy. Making one? That requires precision... and some specialist equipment.
    You can buy a professional tea tasting set from this Amazon UK affiliate link:
    Thanks to Morag Hickman for letting me borrow her workshop for last-minute filming! She makes beautiful jewellery, like ring-keepers, dragon necklaces and rings that looks like ocean waves:
    Update: someone has found an earlier ISO cup of tea on the internet, as part of a German video on tea tasting:
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Comments • 1 407

  • Tom Scott
    Tom Scott  Year ago +6886

    Quietly edited out of this video: two minutes of waiting for the kettle to boil because I forgot to push the button to start it.

    • Lowzboy
      Lowzboy 12 days ago

      Damn it Scott

    • Naiver Miigon
      Naiver Miigon 3 months ago

      Paul Topham maybe boiling under standard pressure so 100 degrees celsius?

    • Ruben Wahab
      Ruben Wahab 3 months ago +1

      Is that prescripted as well, or just advisory?

      MD.ZIMAM AHMED 3 months ago

      You opened my eyes

    • Quincy Allen
      Quincy Allen 9 months ago +1

      I waited 10 minutes for my tea to steep this morning (I usually tell by smell when it's done cause I'm doing other things) only to realize I hadn't poured in the water

  • Gryph Lane
    Gryph Lane 10 days ago

    Or just drink coffee 👍🏻

  • Oskar winters
    Oskar winters 15 days ago

    if you don't like tea why in god's name did you make green tea?!
    it's like marmite!
    you should have made something less extreme like mango tea or pineapple.

  • Artie person guy
    Artie person guy 16 days ago

    1:54 I always thought the trick teapot was the international standard.

  • Grizzly01
    Grizzly01 17 days ago

    2:31 People misunderstanding something, then getting ranty about it? What a surprise.

  • Raghavendraa Goswami
    Raghavendraa Goswami 23 days ago


  • The Pip
    The Pip 26 days ago

    As a Canadian who doesn’t like maple syrup, I can sympathize. Also I’m sorry.

  • William Lee
    William Lee 26 days ago

    0:27 No photography of computer screens.

  • Timberton
    Timberton Month ago

    "I dont actually like tea."

  • Alia Ris
    Alia Ris Month ago

    You don't even mention the _standard_ tea type... I mean, 6 minutes for green tea?? That ruined it, it's eternally hurt me inside.

  • Fiona Gregory
    Fiona Gregory Month ago +1

    use a f7cking tea bag you twat

  • Nbtwall
    Nbtwall Month ago

    The ending will surprise you

  • uabir
    uabir Month ago

    I don't even like tea. Why am I watching this?

  • Mithorium
    Mithorium Month ago

    Of all the cups of tea I've had, this is one of the okayest

  • tihzho
    tihzho Month ago +1

    Quality Standard is misunderstood by people to mean "High Quality" which it is not as you have correctly stated. This ISO standard is meant only for reproducibility - the extent to which consistent results are obtained when an procedure is repeated - in this case, a cup of tea.
    Why is there a ISO (International Organization for Standardization) standard for making a cup of tea? For Example companies who sell tea need a way that their professional tea testers can judge tea quality based only on its composition which is not influenced by the manner of which the tea was made.
    The ISO 9001 series is the best known Quality Management standard for companies and organizations of any size. A company which has adopted the current ISO 9001:2015 Management System Standard and has been certified by a recognized independent authority can display the LOGO and remark they are Quality Assured. However again this in not assurance of high quality, rather its an assurance of consistent quality. The company determines the level of quality of its products and that its consistent.
    For example a pen company can be ISO 9001:2015 registered and every one of their pens leaks when put in a pocket upside down, CONSTANTLY, without fail, no surprises here. Put the pen upside down in your pocket it will definitely leak!! If there is a pen which hasn't leaked when put upside down in your pocket that is considered a defect as it was meant to leak. If the percentages of pens not leaking rises above a predetermined failure rate a Corrective Action Report (CAR) is generated to determine why these pens are failing to leak. A CAR is used as response to a defect which means what action/actions adopted to eliminate the problem of not leaking from occurring again.
    This is over simplified as this is a very complex system, but perhaps you got the gist.

  • sonycans
    sonycans Month ago

    Can you please make a video on paint drying or the growth of grass in real time?
    I've just wasted three minutes of my life.

  • melhupby
    melhupby Month ago

    So I finally bit the bullet and subscribed after seeing your content pop up for what feels like years, and thoroughly enjoying every single one.
    Then I promptly unsubscribed when you betrayed the crown and your countrymen by professing to _dislike_ TEA!!!
    (And then subscribed again because y'know...this is one of the few channels I'd be happy to get notified about.)

  • redsquirrel0249
    redsquirrel0249 Month ago

    who tf want's a "reproducable" cup of tea if it's rubbish? That's what scientists in labs do to learn stuff, not make tea

  • Gabriel Williams
    Gabriel Williams Month ago +1

    Well done!
    The ending genuinely made me laugh.

  • Xykeal
    Xykeal Month ago

    "There is no perfect cup of tea, only the right one for you"

  • Heckin Memes
    Heckin Memes Month ago

    Gonna start heating my prefrozen tea in the microwave now.

  • Reza Rahman
    Reza Rahman Month ago +1

    Me: *try to make standard cup of tea*
    A couple seconds later: it taste like PISS

  • CrazyCaluz
    CrazyCaluz Month ago


  • killer ninja
    killer ninja Month ago

    Chinese here: NEVER add milk to tea! Unless its milk tea, that completely different

  • Ser Garlan Tyrell
    Ser Garlan Tyrell Month ago

    I wonder what the standard for a cup of coffee is...

  • Duolingo Owl
    Duolingo Owl Month ago

    What are tea?

  • GreenAppelPie
    GreenAppelPie Month ago

    Cup of tea? Well there’s your problem, make glasses of of ice tea with Orange pekoe or better. That’s it. Well you can let it sit cold for a day, and then drink it.

  • Thomas Sturges-Allard

    You're not meant to use fully boiled water for green tea. Either stop the kettle before completely boiled or let it cool slightly before adding it to the tea.

  • MaxMckayful
    MaxMckayful Month ago

    What types of tests are people running that need a standard for brewing the tea (not trying to mock, serious question). Are there tea regulators? Testing for caffeine content maybe (that'd be a problem if the standard is six minutes!). Curious why these tea ISO's were developed.

  • 233kosta
    233kosta Month ago

    I fuckin' LOVE the fact that BS6008 exists 😂

  • John Citizen
    John Citizen Month ago

    That's so far from being standard. What a bunch of fools

  • rate eightx
    rate eightx Month ago

    6 Minutes? Doesn't Sound Like The Tea's Steeped Long Enough!

  • who cares
    who cares Month ago

    Oi mate! You got loicense for dat kettle?

  • Nora Faithrainbow
    Nora Faithrainbow Month ago

    **Microwaved tea.**

  • Zac Ward
    Zac Ward Month ago

    Make your tea days in advance then warm it up in the microwave.. You've gone too far Tom.

  • WhereWhatHuh
    WhereWhatHuh Month ago

    ARE YOU MAD? This sort of discussion can cause the Heart-of-Gold to lock up all of its processing power at exactly the moment you need to escape a really angry bowl of petunias!
    "Oh no, not again." Now knock that off and wait till you're in England to get tea.

  • Jan Banholzer
    Jan Banholzer Month ago

    Did you buy the scale just for this video? If not, what's your drug of choice?

  • Sohini Mandal
    Sohini Mandal Month ago

    0:27 MADLAD

  • ParkerDai
    ParkerDai Month ago +1

    What!? You don't like tea!? That's TEASON!

    • aknopf
      aknopf Month ago

      What tearrible news!

  • The Illuminaughty
    The Illuminaughty Month ago

    I drink iced and slightly sweetened tea, so there.

  • Christian Oshiro
    Christian Oshiro Month ago

    And I thought Barry Lewis was the only British person to not like tea

  • William Anthony
    William Anthony Month ago

    Teas for muppets .

  • DynestiGTI
    DynestiGTI Month ago +1


  • BearJoyner00
    BearJoyner00 2 months ago

    Boil your tea in a sauce pan adding sugar, put it in a jug, add water, refrigerate it, later on pour 2/3 a glass of it, fill the last 1/3 with milk, enjoy.

    • BearJoyner00
      BearJoyner00 2 months ago

      By the way, this kind of meant specifically for black tea, but I guess it can work for other kinds as well.

  • Malav Patel
    Malav Patel 2 months ago

    No One :
    BS 6008 : BULL S*** 6008 Standard

  • J.J. Shank
    J.J. Shank 2 months ago

    I don't drink tea and I don't approve of Great Britain having a monarchy.

  • Cheddar Kartoschski
    Cheddar Kartoschski 2 months ago

    Never thought, I'd hear someone say that words in this exact accent.
    I've met three guys from Britain over the last few years and they all said, that tea is just brilliant..

  • George Deane
    George Deane 2 months ago

    How do you still have a citizenship after those words???

  • Adam
    Adam 2 months ago +1

    There are people living on one dollar every day working their asses of in sweatshops just to get by. There's probably some poor bastard drowning in an avalanche or some other natural disaster as we speak. Some terrorist probably shot up a daycare yesterday. And then there are some pompous sods with plenty of time on their hands, enough in fact to actually conceptualize an international standard for a cup of tea.

  • Joe AS
    Joe AS 2 months ago

    It’s just a standardized way for tea tasters to know the difference between teas not the guideline to make the best cup of tea

  • Daniel Webb
    Daniel Webb 2 months ago


  • rean syah
    rean syah 2 months ago

    Don't like tea huh?!

  • Yusuf Seedat
    Yusuf Seedat 2 months ago +2

    I don't actually like tea.. I love it..
    I'm sure they cut off the last part

  • nem tudom
    nem tudom 2 months ago

    Why am i not allowed to see the standards? That sounds stupid.

  • Crazy Indian
    Crazy Indian 2 months ago

    I like coffee

  • Duolingo Owl
    Duolingo Owl 2 months ago

    We need the local bobbies involved.

  • not SirBeasty
    not SirBeasty 2 months ago

    Shouldn’t it be bowl of tea then?

  • Derek Read
    Derek Read 2 months ago

    Interesting that you don't mention the current ambient temperature and pressure. I assume those must be stated as part of the standard?
    I assume this ISO standard must mention air pressure somewhere, given that at higher altitudes water boils at lower temperatures. And, given that the tea is left to steep for 6 minutes, surely the ambient air temperature will also affect that part of the process.

  • Mauro Pastorcic
    Mauro Pastorcic 2 months ago

    2:03 who debates tea

  • Jacob Hayes
    Jacob Hayes 2 months ago

    0:27 Thug Life

  • eko pranata
    eko pranata 2 months ago

    There is no perfect cup of tea: there's only the right one for you.

  • Earth2LalaLand
    Earth2LalaLand 3 months ago

    Exactly. I grew up in a tea estate, we use the standard for tea tasting only, and when we taste it we don't actually swallow it since it's brewed for longer than a standard cup of tea (3-4 minutes), and we definitely don't use this method for the cup of tea we drink at home :)

  • Yo Ming
    Yo Ming 3 months ago

    only Russian spies don't like tea

  • Ng John
    Ng John 3 months ago

    That's why you fly around the world for your videos
    Because you are not allowed to be British.
    You don't like tea

    Don't worry
    I don't like tea either
    But I live in Wales

  • Kirk Easterson
    Kirk Easterson 3 months ago

    Does it not specify the temperature of the boiling water?

  • Jacob Taylor
    Jacob Taylor 3 months ago

    Southern-style sweet tea is perfect.

  • Thatguywiththelaptop
    Thatguywiththelaptop 3 months ago

    "I don't actually like tea."
    Iroh is disappointed in you

  • Reltpid
    Reltpid 3 months ago

    *T R A I T O R*

  • Tyler Clark
    Tyler Clark 3 months ago

    Or you could drink it the way god intended; iced, and with copious amounts of sugar.

  • Uh you don't need to know my name

    I'm making some tea right now, someone remind me a few days from now to warm it up in the microwave because Tom said not to.

  • Gekyume Onfroy
    Gekyume Onfroy 3 months ago

    infographic show is the lowest quality yt channel

  • Davenn
    Davenn 3 months ago

    Roses are red
    Violets are blue
    Tom dosent like tea

  • Naiver Miigon
    Naiver Miigon 3 months ago

    00:40 it is fancy but it’s how we Chinese make tea everyday it’s considered a tradition.

  • Trent Fisher
    Trent Fisher 3 months ago

    Am I the only who finds conspicuous how tom has a set of scales that has green stuff on it ???

    • Trent Fisher
      Trent Fisher 3 months ago

      I apologise I am colour blind and I though those black spots on the scales were green sorry mister Scott

  • Dani Morrison
    Dani Morrison 3 months ago

    The idea of an international standard for preparing tea is an interesting idea, we should do it with more things imo.

  • Really Nigga
    Really Nigga 3 months ago

    Hey Tom what is your channel about

  • Jaquinite
    Jaquinite 3 months ago


  • Kofi Mills' Videos
    Kofi Mills' Videos 4 months ago

    My reactions to the topic, in roughly this order:
    😐 a what.
    Wait, srsly, a what? What is this? 😅
    I mean, why tho? 😂
    ... Why?? 😂🤣💀

  • holmrekR
    holmrekR 4 months ago

    *Error 418* im a teapot

  • Joseph Place
    Joseph Place 5 months ago

    0:27 excuse me what?

  • ?
    ? 5 months ago

    If you want to learn how to make good tea, I suggest you ask for advice from an Iranian.

  • iDunnoMapping
    iDunnoMapping 5 months ago

    wendover productions beated you to it.

  • FloppyDriveMaestro
    FloppyDriveMaestro 5 months ago

    That seems overly complicated

  • Brandon Neely
    Brandon Neely 5 months ago

    I don’t like tea either and I live in Georgia where people bleed sweet tea

  • Jeremiah Hsu
    Jeremiah Hsu 5 months ago

    Chinese: smh

  • Rahul Bordoloi
    Rahul Bordoloi 5 months ago

    What a weak ass cup of tea. In Assam, which produces 1/6th of all the tea in the world, we drink tea with twice the liquor and none of the milk, like real men.

    • Eri Airlangga
      Eri Airlangga 4 months ago

      AFAIK The Brits don't produce tea, they sailed around the world to the east Indies for tea, standard cup of tea means luxury to them

  • Noah McArthur
    Noah McArthur 6 months ago

    So, as an American, I feel like I'm missing out on some context. Where did this standard come from and why was it made and what are people saying about it on the internet?

  • Gema Pamungkas
    Gema Pamungkas 6 months ago

    british problem 101

  • Deficere X
    Deficere X 6 months ago

    Wouldn't the standard be China, since they invented tea? Xd

  • Lion
    Lion 6 months ago

    The international standard was never meant for making tea at home, it is for professional tea EVALUATION. Thus, the tea leaves are intentionally brewed way longer. This produces a very thick and strong brew that will exaggerate the tea's notes (its flavor and scent characterstics, as well as color and visual clarity) as well as its quality (both the good and the bad). Truly good quality teas can often stand up to this strong type of brewing and not become overly bitter or hard to drink. Instead there will be an intensity of flavor when sipping this very strong brew, and lingering aftertaste that helps a tea professional evaluate that tea's qualities. This way of brewing tea was never meant for how you'd drink the tea and home, and as far as I know, nobody in any country does make it this way to drink it at home. If anyone thinks this standard is meant to apply to consumers, they are sorely mistaken. It's just a tool for professionals to analyze teas against each other by brewing them exactly the same way, since how you brew the tea (water temperature, leaf to water ratio, and brewing container) drastically affect its flavor.

  • Andrew Virtue
    Andrew Virtue 6 months ago

    This is the anime *HelloFutureMe* Guy!

  • Muddy Sea
    Muddy Sea 6 months ago

    And why would one not add milk to green tea??

  • Min Yoongles
    Min Yoongles 6 months ago

    I don't like tea why am I watching this

  • Dale Richey
    Dale Richey 6 months ago

    3:25, Tom's accent is just a guise. He's not actually British

  • Lana Jig-maker
    Lana Jig-maker 6 months ago

    It's just tea. Make it. Drink it. Enjoy it.
    Any argument about it, needs to go into the bin.

  • EastWood
    EastWood 6 months ago +1

    *Nobody makes a better cup of tea than Indians.*

  • DrPengin
    DrPengin 6 months ago

    So this is the tea that comes out of standard issue starfleet replicators?

  • Samuel Cuthbertson
    Samuel Cuthbertson 6 months ago

    "I don't actually like tea"... British citizenship revoked.

  • Random Guy That Comments on Youtube videos

    0:27 oh tom. You're gonna get banned from the library for this.

    IRON PAINTING 7 months ago

    This is more of a guideline for making tea