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How Are Beverage Cans Made?

Mar 1, 2022Jun 16, 2025 3 mins
  • Beverage Testing
  • Can Inspection
  • Double Seam Inspection
  • Aluminum
  • Metal
  • Steel
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The average beverage can has to do a lot of heavy lifting. It is expected to be light, incredibly well-sealed, and designed to help the contents reach the optimal temperature quickly.

Today’s cans fulfill all these criteria and more, thanks to modern technology and materials – read on to find out how.

What are drinks cans made of?

Roughly three quarters of the world’s beverage cans are made from aluminum. Not only is it cheap and efficient, it’s also infinitely recyclable. The remaining quarter are made from tin-coated steel, which is also the most popular choice for food cans. So, what are food and beverage cans made from?

The aluminum used in beverage cans is alloyed with manganese and magnesium to improve strength and ductility (its ability to deform rather than fracture under pressure). Different alloys and aluminum thicknesses are used for different components of a can.

Aluminum measurements and alloys can be tweaked for maximum efficiency, but must always be carefully QA tested to ensure that they are of a sufficient strength and thickness to avoid warping or implosion. This is an integral part of any can inspection process.

How cans are made

There are two main methods for making beverage cans – the 2 piece can and the 3 piece can – and the manufacturing processes differs for each. 2 piece cans by far dominate the beverage industry, but 3 piece cans are still in use in some parts of the world, particularly for non-carbonated beverages.

How a 3 piece can is made

A 3 piece can has three main components: a body and two ends. For a body, a flat panel is mechanically formed into a cylinder and welded. The body may then be beaded or necked for ease of stacking or display. It is also often coated with a lacquer, depending on the materials used and eventual purpose. The ends are attached by a seaming process, typically a double seam.

How a 2 piece can is made

A 2 piece can is made of two main parts: the body and one end. The body is made from a disc, typically aluminium, and reformed into a cylinder with an integral end. Another end, or lid, is then attached with a double seam, closing the can.

Get the low down on the pros and cons of each can design in our two-piece vs three-piece can guide .

How cans are double seamed

In both types of can, ends are sealed using a double seam. This process, crucial to the integrity of the can, attaches the can end or lid to the body by mechanical process. Three layers of the lid and two of the body are interlocked to create a seam. Done properly, it creates a hermetic seal to keep the contents fresh.  Find out more about the process in our handy double seam guide.

Beverage can testing and completion

A crucial stage in the production of beverage cans is the testing and QA. Even fractional discrepancies can compromise a can’s integrity, causing leakage, venting or degradation of the content. For some insight into the way the beverage packaging industry is currently behaving and adapting, check out our Thirst for Perfection report.

Get help testing your beverage can production process

Need help ensuring your canning process is up to scratch? We’re perfectly placed to provide the support you’re looking for.

We have 50 years of experience in the beverage and canning industry and more than 3,000 unique products to help you find the ideal testing solution for your packaging and products. From double seam testing to axial load and implosion testing for 3 piece cans, get in touch to speak with our team.

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FAQs

  • What materials are used to make beverage cans?

    Beverage cans are typically made from aluminum or tin-plated steel.

  • What is the process of making beverage cans? The process includes forming the can body, applying coatings, printing labels, and sealing the can with a lid. 

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