The jars are really nice and convenient for having enough to go a week before grinding more and not degrading in the meantime. Fits easy in a pocket or to pack in luggage if you travel. Very thick smell proof gasket in the lid. And 420 SCIENCE added a free fine point Sharpie pen to write a strain name on the label. Wipes off with alcohol or soap. They make great gifts and sometimes you get coupon codes back with your order for big discounts. Wonderful store!