DabJars Glass #4, when you need to store a small amount, but want all the quality of a better glass jar. Don't let the size fool you, at appox 1" x 0.5", this jar hold 2m making it the smallest jar we offer. It's screw type cap is made of plastic, and like the others have a foam insert to provide maxium freshness. These aren't the cheap glass that will break when you pinch them... these are tough and durable. Beware of the cheap imitations, it's not worth the risk!!!