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: https://amzn.to/2qfbxyr
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: https://etsy.com/shop/Errant
Update: someone has found an earlier ISO cup of tea on the internet, as part of a German video on tea tasting: https://www.youtube.com/watch?v=utwwkNkNgiM
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