I need your help! 
I am looking for a gift for my boyfriend who is getting his PhD. I am not looking into getting him any gift, in the sense that he is not expecting any. Thus, I want to get him something he will enjoy. Pens, picture frames, watches, ties etc. are out of question.
I understand you don't know him, so you don't know what he enjoys. What I'd like from you, however, is to share what kind of gifts you would enjoy, hoping that something will inspire me.
Up to now, my winning candidate is a bottle of good whisky, because it is a drink he really likes and he enjoys such little "luxury"-moments more than he wants to admit.
My budget is up to 100€ (~140 USD).

I am looking for a gift for my boyfriend who is getting his PhD. I am not looking into getting him any gift, in the sense that he is not expecting any. Thus, I want to get him something he will enjoy. Pens, picture frames, watches, ties etc. are out of question.
I understand you don't know him, so you don't know what he enjoys. What I'd like from you, however, is to share what kind of gifts you would enjoy, hoping that something will inspire me.

Up to now, my winning candidate is a bottle of good whisky, because it is a drink he really likes and he enjoys such little "luxury"-moments more than he wants to admit.
My budget is up to 100€ (~140 USD).