Message in a bottle for anniversaries. Have wedding Guests write a note(s) and they can choose what year to personalize their note for. Then they stick it in the appropriate bottle! Married couple reads the notes on the matching anniversaries.
Love the idea of creating a shadow box to remember the wedding! (Ideas)Wedding Program Shower Invitations Bachelorette Party Invitation Rehearsal Dinner Invitation Koozie favor from my bachelorette Party Plane tickets from our honeymoon