If I had to describe these spice jars in one word, QUALITY! My biggest pet peeve when I store spices is when they solidify and clump together because of air and moisture getting in. These jars are air tight. The rubber seal is thick, and doesn't feel as though its going to try out or fall off anytime soon. The bottom of the jars also have the perfect amount of room to add a small round circle for labeling. Id recommend a nice in cabinet tiered spice rack to set them on as they don't stack.