Five years ago, a student gave me a little brass plate on a stand with an etched view of Hong Kong harbour.
Unless of course the giftee is watching their weight, has a gluten intolerance, or is allergic to food preservatives … An expensive, permanent gift may be more of a burden than a pleasure.
When I asked on Twitter what people were buying their Ph D supervisor I was surprised by the range of different responses.
Some people had no idea what to buy and expressed interest in such a post because the etiquette for this situation is so opaque.
Make sure you ask more than one as opinions may vary.
Finally: just because certain behaviour is considered ‘normal’ doesn’t mean you have to normal.