This 420 Science UV Concentrate Jar with Silver Leaf design is made to protect your precious oils and concentrates from degradation due to the effect of sunlight. Featuring a screw-top plastic lid and a reverse bevel inside so that your sticky wax etc. don’t get wedged in the indent making it tricky to extract. These storage jars are made from European pressed glass and are available in two sizes.UV Concentrate Jar sizes:Small: Holds between 3 – 5 gr. of concentrate (10 ml.) and measures 3.2 cm. high by 4.3 cm. wide.Large: Holds between 30 – 50 gr. of concentrate (100 ml.) and measures 4.5 cm. high by 7.6 cm. wide.Lifetime warranty against breakages.