The filaments are very sensitive to light and oxygen, so they need to be kept in a dark, airtight  environment to maintain their quality. Store the spice below 68 °F (20 °C) in an airtight metal or glass container. Plastic will decrease the quality, so it’s best to avoid keeping it in a plastic container. If the container you are using is transparent, wrap the filaments in foil to protect them from exposure to light.