Mouth The opening of plastic bottles.Generally, plastic jars have the wide mouth.
Overflow capability：The max volume when a container full filled to the very top.
Neck Finish：The screw-threaded part of the bottles that holds the cap or closure in place.It is usually expressed as two reference numbers such as 24-410, the first number 24 refers to the overall diameter in millimeters, and the second number 410 refers to the thread size.
Threads：The twisted spiral on neck finish to match the corresponding cap or closure.It is very important to the sealability of the plastic bottle.
Bead：The collar beneath the neck where the cap or closure rests.
Wall：The thickness of the plastic containers measured at the side. It varies on the basis of the manufacturing process and original materials.
Standard Capacity：The normal volume when plastic bottles filled with contents up to the shoulder area.
R Angle：The vector angle on the shoulder which determines the shape of the shoulder. Such as cylinder plastic bottle, the R angle on the shoulder is 90 degree.
Shoulder：The area between the top of the body and bottom of the neck.
Label Panel：The body part where labels or printings can be applied
Seat：The indentations under the base that allow the filling or decorating equipment lines to align the bottles for optimum results.
Base：The bottom part of the plastic bottle where recycling codes, material mark or other decorations can be applied. Plastic bottles can stand stably on the shelf with base.