420 Science Pop Top Stash Jar - Hello My Strain Is (medium) This medium stash jar will hold 1/3 ounce and ensure that it stays fresh. The glass lid has a gasket seal that you'll hear POP every time you open your 420 Jar. 420 Science applies the glass-fired decals by hand on every 420 Jar in their Austin, TX facility. The designs are printed with a special ink made from finely ground glass and then fired in a kiln at over 1,000 degrees, permanently binding the design to the jar. Height: 4 inches Width: 3 inches Holds: 7 fl. oz. / 1/3 oz herb