Premium Quality European LABORATORY TESTED AND APPROVED, ULTRAVIOLET GLASS: Preserve and rejuvenate freshness of plant-based goods, for over 6 months! Storage Containers for storing your nuts, seeds, herbs, coffee, teas, super foods, dried foods, granola, algae, and protein powders, baking flours. It prevents harmful visible light rays from penetrating and degrading your stored products, while at the same time allowing beneficial UV and infrared wavelengths of light that can kill molds, algae, and bacteria. Modern screw on lid made of heavy duty BPA-Free plastic. Contemporary Design.