Uses for Empty Jars:
Decorations – Your imagination is the limit on this one. Put rocks in the bottom, or fish tank pebbles, or any number of other things.
Plants – You could plant something small in one of these. Hmm.. Maybe I could grow some kitty catnip!
Artwork - Layer sand, or other items into your jars. Best with one that you can put the lid onto.
Bathroom Storage - Fill with cotton puffs, hair pins, whatever else floats around on your counters.
In the Kitchen - Some of the jars would make great drinking glasses! (make sure they are well cleaned first)
Candy Jars - Enough said
Empty Scent Pods - Great to store small items like paperclips or craft supplies.