Out of all the major things Daniel Radcliffe could have walked off with from the Harry Potter sets, the only things he has held on to were the glasses at the end of each production.

His explanation actually provides some context as to why,

“The ones from the first film are absolutely tiny now, but they are very sweet. – They are all lens-less as well. There was rarely ever any glass in the actual glasses, because of filming problems with reflections.”