HOW TO CHOOSE BOTTLES?
Neck Finish and Cap
- Understanding a container’s neck finish is an important step in proper closure/bottle sourcing.
- Screw thread closure sizes are expressed in two numbers.
- The first number refers to the closure diameter (in mm) and the second number represents the GPI finish (the top of the container).
- For example, a neck size of 28-410 has a diameter of 28 mm and fits a container with a 410 GPI thread finish.