Are aluminium cans more sustainable than plastic bottles?

Aluminium cans are often considered more environmentally sustainable than plastic bottles for bottled water due to several factors. When people ask “is aluminium better than plastic?” or “is plastic or aluminium better for the environment?”, the answer usually comes down to how each material behaves across its full lifecycle — from production, to use, to what happens after we finish drinking from it. Here’s a comparison highlighting why aluminium cans generally have a stronger environmental profile.

Recyclability

Aluminium cans are highly recyclable, with a recycling rate of around 69% globally. In contrast, plastic bottles, especially those made from polyethylene terephthalate (PET), have a lower recycling rate, estimated at around 29% and as low as 12% in Australia. Aluminium can be recycled repeatedly without losing its quality, which is one of the biggest advantages when comparing aluminium cans vs plastic bottles.

Plastic, on the other hand, gradually breaks down in quality each time it goes through the recycling process, meaning it can only be reused a limited number of times. Naturally, this raises another common question: is aluminium easier to recycle than plastic? In most cases, yes. Aluminium has strong value in the recycling industry, so it’s more likely to actually be collected, processed, and reused — rather than ending up in landfill.

Material production

There’s no avoiding the fact that aluminium production is energy-intensive and does generate greenhouse gas emissions. However, once the aluminium is produced, it can be recycled and reused multiple times with far less environmental cost. That long-term efficiency plays a big part in answering whether aluminium bottles are better than plastic when we take sustainability seriously.

Plastic bottles are typically made from fossil fuels such as petroleum or natural gas, relying heavily on virgin materials. This contributes to both carbon emissions and an ongoing dependence on non-renewable resources. Even before a plastic bottle reaches a shelf, its environmental footprint is already significant.

Energy savings

Another important consideration in the aluminium cans vs plastic bottles discussion is energy use. Recycling aluminium is incredibly efficient – according to the International Aluminium Institute, producing a recycled aluminium can uses up to 95% less energy compared to manufacturing a can from raw materials. Plastic does not deliver the same level of energy savings when recycled, and producing new plastic bottles remains a relatively energy-heavy process.

Waste reduction

While it’s great to talk about potential sustainability, what really matters is what happens in the real world. Aluminium cans are far more likely to be placed in recycling bins because people understand their value and there is stronger infrastructure in place to collect and reuse them. This greatly reduces the volume of waste heading to landfill. Plastic bottles, unfortunately, have a different story.

When people ask, “is aluminium better than plastic for the environment?”, part of the answer lies in the visible plastic pollution in oceans, waterways, and natural environments. Once plastic enters these ecosystems, it breaks down into microplastics and remains there for decades.

Environmental impact

Aluminium is considered a permanent material, meaning it can be recycled over and over again without losing quality – this gives it a significant sustainability advantage throughout its lifecycle. Plastic rarely enjoys the same future. Even if recycled, it usually ends up “downcycled” into lower-grade plastic products, which eventually still reach landfill or incineration.

Another question often raised is: are aluminium cans biodegradable? The answer is no… aluminium does not biodegrade. However, because it's so valuable and infinitely recyclable, it shouldn’t need to. The goal is to keep it in circulation through a proper circular economy, rather than ever reaching landfill in the first place.

Supporting a circular economy

Aluminium cans hold strong scrap value, meaning they actively encourage recycling systems to work well. This financial incentive supports a true circular economy model, where materials stay in use rather than continually being replaced. Plastic bottles struggle to achieve the same result due to declining material value after each recycling cycle.

What’s the takeaway?

When comparing aluminium cans vs plastic bottles, the sustainability conversation isn’t about perfection; it’s about progress and choosing the better option wherever possible. Aluminium isn’t without environmental cost, particularly in its initial production stage, but its ability to be reused endlessly, its high recycling rates, and its strong role in a circular economy generally make it a more responsible choice than plastic.

The world needs more doers, dreamers and trailblazers who care… this is why we’re bringing you refreshingly pure Australian spring water in a can – the most recycled and most recyclable packaging on Earth. It’s simple water with a powerful impact, with every can helping protect Australia’s amazing wildlife. For more information, don’t hesitate to get in touch with our friendly team.