Researchers in Portugal have developed compostable cosmetic packaging that mimics plastic, offering a safer and more sustainable alternative.
A new material developed in Portugal could revolutionize the way we package cosmetics. Scientists at the University of Coimbra have created compostable cosmetic packaging made entirely from renewable sources. Unlike fossil fuel plastics, this packaging is designed to perform just as well while breaking down safely in the environment.
The material combines polylactic acid, PHBV (a plastic naturally made by bacteria), chitosan, essential oils, a natural plasticizer, and phycocyanin, a pigment from spirulina algae. This mix produces packaging that is both strong and flexible, making it easy to mold into various cosmetic containers. The cosmetics industry produces massive amounts of plastic waste, and a compostable option could reduce the strain on landfills and cut down on pollution.
What makes this material stand out is that it doesn’t just mimic plastic; it improves it. Essential oils provide a natural fragrance, replacing the harsh chemical smell many consumers dislike. Phycocyanin adds a rare natural blue colour, making packaging both functional and visually appealing. These sensory details —smell, texture, and colour —also influence buying decisions, helping brands stand out in crowded markets.
The research is part of two larger projects: NABIA and Packaging of the Future. Supported by the European Union and the Portuguese government, the initiatives bring together 79 industries and universities. Their goal is to create packaging that is sustainable, innovative, and competitive, all while promoting a circular economy. Compostable cosmetic packaging is a key focus, offering an alternative to the single-use plastics that currently dominate store shelves.
One major advantage is how the material can be produced. Traditional plastic manufacturing often requires costly molds. This new material is compatible with 3D printing, also known as additive manufacturing. That means prototypes can be made faster and with less waste. Companies can experiment with creative designs at lower costs, while consumers may benefit from more variety and innovation.
The material can also be recycled back into pellets and reused, much like traditional plastics. This feature makes it especially promising for creating a closed-loop system where packaging is continually repurposed instead of thrown away. In terms of strength, it performs like everyday plastics such as polyethylene (PE) and polypropylene (PP), which are found in common products like shampoo bottles and food containers. Compostable cosmetic packaging that meets these standards could one day replace large portions of fossil-based plastics.
See also: France Moves Forward with a Forever Chemical Ban, Targeting PFAS in Everyday Products
Health is another benefit. Many synthetic fragrances in plastics are made from petrochemicals and are linked to hormone disruption. The essential oils in this compostable cosmetic packaging are plant-based and renewable. This makes them safer for both people and the environment. By choosing natural additives, the research team is addressing not only environmental concerns but also consumer health and safety.
Of course, no packaging is entirely free from impact, but the team is working to minimize harm. By using renewable resources, reducing the need for synthetic additives, and making the material recyclable, they are lowering its footprint compared to standard plastics. Cosmetics are a logical place to start because packaging often plays a central role in how products are marketed. If consumers choose items wrapped in compostable cosmetic packaging, it could drive broader changes across industries.
This work also highlights how science and technology can combine to solve modern challenges. By blending biology, chemistry, and advanced manufacturing, researchers are designing materials that meet both sustainability goals and industry needs. Instead of asking businesses to sacrifice quality for sustainability, compostable cosmetic packaging offers both.
Next steps include scaling up production and testing how the material behaves in real-world use. While challenges remain, this innovation offers hope that the packaging of the future can protect products, appeal to consumers, and still respect the planet.
