This is a 60mL LDPE flat shoulder cylinder bottle and has a 13-415 neck finish. Low-density polyethylene (LDPE) is a soft, flexible, lightweight plastic material. Traditionally used for pharmaceutical, chemical and laboratory applications, popular uses break the mold and extend across most markets today. These easy squeeze LDPE bottles are flame treated, which helps when decorating bottles. These bottles are sold by the case (100 count).