From the product description, check product page for current description, price and availability:

FOUR PACK 1 GALLON GLASS JARS – You will receive (4) One Gallon large glass jars with (4) plastic airtight and leakproof lids. Also included are four 7″ rubber bands and four sheets of 8″x8″ muslin cloth that is breathable to let in air but keep out contaminants and bugs. This is the perfect kit to get started brewing Kombucha, Tea, and other drinks. *Scoby and other ingredients are not included in this set.

HEAT RESISTANT UP TO 350ºF – Our 1 Gallon wide mouth jars are heat resistant up to 350ºF which means you can pour your bioling water right into it and begin brewing your Kombucha scoby, Sun Tea, or any other hot liquid without having to wait for the water to cool down.

AIRTIGHT & LEAKPROOF LID – Unlike other sellers, our lids are high quality and will not break. The 100% BPA Free plastic lids come with a removable seal to make it airtight and leakproof. It will also not corrode or rust like metal lids.