Keep your stash fresh with the ONGROK Vacuum UV Glass Jar! The lid of the jar has a silicone gasket, allowing the vacuum pump button to be pressed to remove air and lock in freshness. This also contains any odors between sessions. When you're ready to open the jar, an alternate button releases the vacuum seal. The sturdy glass build has a UV-resistant frosted finish to keep out any harmful light that may cause herb degredation in long-term storage. Each jar includes non-slip color coded silicone base rings, jar labels, and a marker.