This is a 50mL Child Resistant and Tamper Evident LDPE Big Mouth Boston Bottle. The highly popular Big Mouth Boston dropper bottles are now available in V3 style, meaning the tip is pre-inserted into the cap (not included) for easy installation by man or machine. Instead of a plug style tip, the tip now clips onto the outer and inner lip of the bottle neck to prevent the tip from blowing out under pressure. Low-density polyethylene (LDPE) is a soft, flexible, lightweight plastic material. The bottle is perfect for liquid applications which features a wide neck for easy filling and easy to squeeze. These easy squeeze LDPE bottles are flame treated, which helps when decorating bottles. These bottles are sold by the case (100 count).