Compared to other types of vials, prefer vials have a wider mouth, making them easy to fill, and comes with a child-resistant push and turn closure. Prefer vials are CPSC certified and come with the caps already included and ready to go. It is a “packer bottle” style with an Ultra-Clear view, wide mouth opening and Child Resistant Screw Top cap. It comes with the cap already attached to the vial. EZ Open cap is also available. It comes in Amber, Blue, and Green. Value Vials wholesale and retail discount prescription containers, vials, and bottles. It contains Child-Resistant Caps. Snap Cap Vials. Thumb. Certifications are available for download in our online store within each product description.