Closures: the key to making a good composite can great


Choosing the right closure for your composite can is not brain science, but must be well thought out before tackling your next packaging project. The key is to get the terminology down and to understand the functionality of each part. Here is a quick guide:


Sifter tops : Are functional covers that are used to dispense contents at a predetermined rate depending on the perforation shape and size. These types of openings are often used for seasonings and household powders. Sifter tops can be glued to the can or friction applied.

Slipcovers : Are removable stamped metal closures that can also be embossed with print or graphic information to add a classy finish to the can. Slipcovers are often used in the wine and spirits, cosmetics and even the clothing industry. They can also be slit and used as change collection cans or ballot containers.

Rings and plugs : As the term implies, a metal ring is seamed at the top of the canister. A metal bottom is also seamed on. Like slipcovers, plugs are inserted in the rings after filling.

EZO’s and foil membranes : Also known as Easy Open All Aluminum closure tabs (upper picture) as for foil membranes (lower pictures) are used to completely seal the top of the can. Used in the food industry, grease cartridges, oil treatment, tabs and membranes are usually coupled with plastic overcaps.

Overcaps : Can come in a limitless number of colors and opacity levels. Also known as plastic protective covers, once the tabs or membranes are removed from the can, the plastic overcap serves as a flexible and reusable closure. The overcap can also be printed to get your branding front and center to the consumer.


Ends (upper picture) are punched tin plated metal and seamed on the bottom end of the cans.
Bottoms (lower picture) on the other hand are normally made from plastic and can be pressure fitted.

So now that you have the right words to describe your composite can closures, the only other thing to know is that they come in a wide variety of types, materials and sizes. Let one of our friendly customer service agents guide you through the process. You can reach us at 1-888-5-CANFAB or Live Chat with us on the website ( You can also use our handy volume converter tool on the website to give you an idea of the volume per can based on the diameter and height required.