The 30/25 neck standard is a suitable choice for packaging non-carbonated liquids and beverages. Generally used for water bottles, this preform neck has applications for other forms of non-carbonated drinks such as juice and dairy products due to its rigidity and quality.Ø37mm Neck Preforms: This preform neck follows the well-known SP400 standard which consists of a single continuous thread around the perform neck, making it suitable for products which use special caps and closures such as flip-top caps. This neck standard is mainly used for packaging food products such as honey, chocolate sauce, and dressings.