This is so unusual that it took me awhile to find out just what this little gadget was. The little piece of paper inside is no longer usable but the piece is such a conversation started! The inside says to refill every two weeks. They used this for bad breath before the mints and sheets you put on your tongue came out. Not sure what year this came out but my guess is mid-century. Check out all the pics on this little device. Overall size is 1 ¾” x 1” approximately.