I think transitional objects are in the eye of the beholder

not a concrete, "here's a transitional object, use it wisely" sort of thing? Sometimes I think therapists have certain items they have seen that individual person enjoys or puts meaning into and so that's "helpful". But you can "decide" something is something you enjoy; I know the first time I saw my therapist again (for the second set of 9 years :-) she left a note to me on the outer door of the office as it was a townhouse/2-story affair and complicated to get to the actual office so there was instructions, to me. I kept the note in my wallet because it was hand written and a year or three later gave it to her, deciding I did not "need" it anymore. She was amazed, did not know I had it/had done it. If something has meaning to you; that's great and a good subject to discuss with your therapist, the "personal" nature of it and a good way to sort of back into discussing attachment, etc. if you want.
I had a little item I loved of mine and later in therapy I gave it to my therapist to hold for me, to take care of, which she did. That was interesting because it was like deliberately giving her a piece of myself and how I felt with it being in someone else's charge, etc., it was like she had a "hold" over me :-) could hurt my object if I didn't "do" like she said? That obviously was not from "her" but from my own past/life story so good fodder for discussion. But following the feelings are what the whole therapy experience is about so anything you "feel" about, is great for discussing with your therapist when you're able. It's like beginning to pull on a thread, unwrapping the mummy