Whether you’re talking about plastic foam bottles , mist sprayer bottles , airless bottles , or other types of containers from www.ahpackaging.com , you often hear the term neck finish, but, what exactly is it? Explanations and points to watch about neck finishes The neck is the upper part of the bottle that accommodates the cap, the lid, the dosing pump, the trigger sprayer or the dispensing sprayer. The closure must have the same neck finish as your bottle, jar or other container to make sure it doesn’t leak. To make sure you get a compatible closure for your container, choose one of the lids shown at the bottom of the page of the container you’ve selected. What is a neck finish? A neck finish is defined by a number of dimensions, including: the height, its inner diameter its outer diameter the thread, for containers with screw-on lids The dimensions are always expressed in millimetres. Understanding neck finish sizes 20/410, 24/415, 28/410, n...