VIOLUX 100ml Ultraviolet UV Glass Airtight Jar and Stash Container, Smell Proof for Herbs and Food SUPERIOR PROTECTION against harmful light rays that cause organic materials to breakdown and decompose rapidly. PRESERVE your products with an airtight seal to insure optimal freshness, potency and quality. LIFE ENHANCING violet glass allows nurturing UVa and infrared light rays in that preserve organic materials, freshness, color, aroma and taste. SCIENCE + BEAUTY violet glass containers are extremely effective as well as beautifully designed to add more value to your product. MONEY-BACK GUARANTEE If you are not 100% satisfied with you VIOLUX glass products you can return them within 30 days for your money back.