Need extra brewing jars. These 1.9l glass pickle jars are ideal for kombucha brewing. We advise that you fill the glass jar 3/4 full so that you have the largest surface area for your scoby. The opening is wide enough to fit your hand in to remove your scoby and to provide air for your brew. These are sturdy and strong top quality brewing jars . They can differ in shape slightly but they are all the same size. This jar comes with a cloth covering making it ideal for Kombucha or milk kefir.