What do I give to my boyfriend as a graduation gift?

My boyfriend is graduating from Uni in the UK in a few weeks. It’s his undergraduate and we’ve been together a year and a half, so pretty serious. I don’t really know what the “done thing” is with respect to graduation presents so would love any suggestions! I’m thinking something along the lines of a book which has specific reference to life after uni or something to make him a little more organised in his new job! There is a running joke about him being late all the time but he wouldn’t wear a watch if I bought one. Thanks!