There really is no limit to what you can do with all those empty coffee jars and jam jars. They actually make quite a decent receptacle for a pot plant that you plan to give away as a gift. However, the trick is not to over-water. Plants can't survive in waterlogged soil. So since a jar has no drainage, you'll need to water very, very sparingly. I usually paint or decorate my jars, but wrapping them in scrap fabric also adds a nice touch.