Glass Droppers for 4 fl oz (118 ml) Glass Bottles (22/400)

Glass Dropper

Easy-to-use glass droppers for our amber and cobalt glass bottles. Fits any standard glass bottle sold by our stores (may not fit bottles purchased elsewhere).

These droppers have special bulbed dropper tips, for more even and precise measurements.

Cap: 22/400 neck size.

What is a bottle neck?

A bottle neck refers to the narrowest part of the bottle. Bottles feature a smaller mouth (opening) than the diameter of the body. Bottle designs naturally taper in to accommodate the smaller opening which creates the ‘neck’ section of the bottle. The narrow neck of a bottle provides more control when handling product and also allows the use of a wide variety of closures (or caps) and dispensers.

How to Measure a Neck Finish

“T” Dimension

The “T” dimension measures the outside diameter of the thread. This measurement determines the closure counterpart for the bottle.

“E” Dimension

The “E” dimension measures the outside diameter of the neck. The thread depth is determined by the difference between “E” and “T” divided by two.

“I” Dimension

The “I” dimension measures the inner diameter of the bottle neck. Specifications for “I” are required at the very minimum for sufficient clearance for filling tubes. Linerless closures with a plug or land seal and dispensing plugs and fitments require a controlled “I” dimension for proper fit.

“S” Dimension

The “S” dimension measures from the top of the finish to the top edge of the first thread. This measurement is the key factor to determine the orientation of the closure and the amount of thread engagement between the bottle and the cap.

“H” Dimension

The “H” dimension is the height of the neck finish. This is measured from the top of the neck to the point where the diameter “T” (the outside diameter of the thread) extends down to where it intersects with the shoulder.