... concert tickets? Maybe I'm the only one that will appreciate this because of my love of jars - especially rusty topped jars - and my hoarding tendencies of bits and pieces of life's moments - but I think it's cute. I like to be able to visually see everything instead of having things thrown in a box. Cute idea for all those ticket stubs and other stuff.
I'm loving these mason jar pins too... serving ice cream in mini jars (look out Christmas)... end of year time capsules and vacation memory jars.
And, a photo in olive oil... yummy. ;-)