Thank you. I have added that to my shopping list. Meanwhile, I tried it again with Bombay Sapphire (not my favourite) … and it was absolutely delicious! I do not understand the chemistry at all, but this is a brilliant one for experimenting with.
Tried this with Tanqueray Export and 本所ぞ若戎酒 2020 - very interesting (and moreish), but this will be a completely different drink when made with less strongly flavoured ingredients. An invitation to experiment, certainly, but some guidance would be very welcome.
Thanks for the reply and the link Simon! Does not look like they are still selling these exact glasses, but they have a similar one with a cone shaped base.