Blue Indicating Silica Gel is suitable for use with non-dusting packing of electronic equipment and in applications with visual moisture controls. Orange Indicating Silica Gel is suitable for food and pharmaceutical applications, drying flower. Any product that will damage with high humidity such as leather, vitamins and electrical goods may have silica gel within the packaging. Drying processes like flower or seed preservation might also include silica get desiccants Each bottle have double cap to prevent it from absobing humdiity when not in use.