This is a bridge in Paris. You hang locks on it with the name of you & your boyfriend/girlfriend/bestfriend then throw the key into the river. So even though the friend/relationship may end, you can’t remove the lock. It stays there forever, as relevance to someone once a part of your life. -- Totally just added this to my bucket list!
Luggage tags that both compliment and call for help. Not only will you be able to distinguish your bag from the rest, but someone with a similar sense of humor might actually help you find it!