4 oz premium borosilicate clear glass jar with bamboo silicone sealed lid (6 pack) - non-toxic, bpa free, higher thermal shock resistance than regular glass, microwave, dishwasher, freezer safe juvitus measurements: height - 2.65" x diameter - 2.55". these jars are made of borosilicate glass making it extremely durable and resistant to chemicals and high heat. the bamboo lid has a silicone suction liner to ensure an airtight seal that locks out moisture.