I think I’m uniquely qualified to answer this, living about 5 blocks from 9Siam and having dropped in over the years a few times to eat there...
a previous version of the restaurant was called Hot and Cold Bowls!
Oh ok that’s cool ! But are you sure about that ?
Did you ask Siri « what is absolute zero » ? (And then if she doesn’t automatically proceed to read it, ask her to read it.)
That way you can compare her intonation to the neural sample provided on this page https://www.apple.com/ios/ios-13/ (scroll down to Siri and then click the + button then listen to sample).
On my side the absolute zero definition still has some unnatural intonations.