How to Choose the Right Closure or Cap for Your Plastic Squeeze Tube?

Cap For Your Plastic Squeeze Tube

Plastic Squeeze tubes are a great product packaging solution for various niches, from the cosmetic industry to medicated products. At the same time, everyone knows that the cap should fit perfectly on your squeeze tube to prevent leakage, evaporation, and dangerous spills. Many don’t know how to measure the perfect cap size for your squeeze tube.

If you also own a business and are looking for squeeze tube packaging for your product but need help finding the right size of caps, this article is certainly for you. Tread along, and we’ll guide you on everything you need to know.

How To Measure?

Closure or cap sizes of squeeze tubes are expressed in two numbers:

  • The first number refers to the diameter of the closure of the squeeze tube in millimeters (mm) and is measured across the inside of the cap at the bottle’s opening.
  • The second number refers to the height of the cap concerning the length of the squeeze tube.

Types of Caps Used in Plastic Squeeze Tubes

When it comes to squeezing tube caps, there are various options you can choose from. A wider variety allows you to create combinations best suited for the type of product you have and the quantity you want to sell it in. There are mainly two types of caps or closures used for squeeze tubes:

Flip-Top Cap

A flip-top cap is a screw cap with enhanced practical functionality. It includes a hinged lid that you can flip open to reveal a spout, nozzle, or series of holes. This allows the consumer to easily access the contents of the container without having to remove the cap fully.

Snap-To Cap

The snap-to cap greatly resembles the flip-top cap. However, the hinge on the attached lid is designed in such a manner that snaps open or close, reducing the chances of the container being left open hence helping to preserve the products inside.

Standard Flip-Top caps are still the most prominently used in the market, while other types are also gaining popularity, specifically in the health and cosmetic industries. For example, screw caps can now come with wand applicators where the cap not only works as a seal but also handles it with an applicator tip that is used to apply beauty products like eye makeup, lip gloss, etc.

How To Measure the Closure or Cap Accurately?

Some steps should be focused upon while measuring the accurate size of caps of your squeeze tube:

Plastic Squeeze Tube Size & Construction

Firstly, you need to know the precise neck size of your squeeze tube and ask the manufacturer for the type of plastic they use in manufacturing. Once you have these measurements, note them, as they’ll come in handy later. Please measure the size and type and note it down.

Cap Size, Depth, & Texture

Once you’re down with noting the size of the squeeze tube, you need a compatible cap size. The neck size of the tube is equal to the depth of the cap.

How to measure the diameter of the cap: Measure the cap from the inner wall from one end to the other. Read your measurement at the second end and note it down. This area is also commonly called the “T” dimension. Measurements are shown in millimeters, but you can convert them into any other unit at your convenience.

How to measure a bottleneck opening diameter: Measure the diameter of the outermost threads by placing the tube’s opening firmly against the notch on the right side of the cap measurer. Read to the outer edge of the opening on the opposite side of the neck opening.

How to determine the thread finish: Verify how often the threads pass one another to determine the finish. For instance, a tube with 1.5 thread turns has a 410-neck finish. This is also called the “H” dimension. Refer to the Thread Finish Guide on the back of the cap measurer.


In the case of squeeze tubes, a liner is fitted on the bottle’s opening after the bottle is filled with liquid. It is removed easily. It prevents the leakage of the product during shipment or before the use of the bottle. Two types of liners are used for squeeze bottles:

  • 1-piece heat induction liners (foil, creates tamper-evident packages)
  • 2-piece heat induction liners (foil creates tamper-evident packages, and the secondary liner prevents leaking after the cap is re-applied)


The color of the cap is also an important factor that affects your tube in positive or negative ways. Caps of plastic squeeze tubes can be customized by using colors with a mirror effect which helps you enhance the appearance of your product.

Caps can help you make your squeeze tube stand out in the market when it has a metallic finish on it. Please choose the color according to your choice but keep the choice or demand of the customer in your mind, as they are the ones who will buy your squeeze tube. Samples Company is the best option for the manufacturing of caps for a squeeze tube.

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