Plastic Vials with Child-Resistant Caps,20 Dram - 12 Per Bag- white polypropylene vials with reversible child resistant caps. These plastic vials have high impact resistance, are opaque for storing light sensitive products, and offer unique L-shaped outer threading and continual inner threading for use with compatible dual purpose child resistant caps. The child resistant caps can attach to the external threading for a child resistant seal, which can be opened by following the printed instructions on the top of the caps. The child resistant caps can also be flipped upside down and secured to the internal threading of the vials for a non-child resistant seal. Test these white child resistant vials with a variety of pharmaceutical products, like OTC pills, CBD products, and more. *Note: Diameter is measured from the widest point of the container and/or cap.