This listing is for one(1) to eight(8) sterilized white millet jars used for mushroom inoculation. These jars come sterilized and with a self-healing port and filter lid. They normally have tin foil around the top since that's how they are prepared before sterilization. You can message us for inquiries about other similar or related products if you don't see them currently available in our store or if you have a question about bulk orders. This item is made of millet, mason jar and self healing and filter port lid.