Trays are fully stackable, so it's very easy to put them away when not in use. Each gem jar comes with a soft insert pad inside and lid for keeping your item from moving around the jar. These will hold all of your loose stones, beads and coins This is a new gemstone display tray and insert that contains foam removable clear plastic round jars Each Tray insert has 50 gem jars and they are all fully removable from the insert.