Compostable food packaging: when throwing away becomes the sustainable solution

Food packaging is undergoing a profound transformation. For decades, plastic solutions dominated – functional, but environmentally problematic. Today, pressure is mounting from several directions: stricter regulation, corporate ESG goals, rising consumer expectations, and the visible consequences of plastic pollution. While policymakers and industry increasingly emphasize recycling, in practice only a small fraction of plastic packaging worldwide is actually recycled.

At the same time, takeout and delivery services in food service, outdoor dining, and convenience concepts in retail are expanding – and with them the demand for single-use packaging. The challenge is to combine functionality, food safety, and sustainability.

Compostable packaging made from natural materials is increasingly seen as a promising alternative. Research, material innovation, and new industrial processes are driving development – from algae-based biopolymers and starch composites to fiber-based molded materials. A key distinction must be made between compostable and biodegradable packaging. An even more radical solution is edible packaging: it can be consumed along with the product and eliminates packaging waste entirely.

Packaging can become even more sustainable when it is made from by-products or waste from other production processes. This upcycling approach uses materials that already exist – such as agricultural residues or by-products from food processing – instead of cultivating or producing new raw materials specifically for that purpose. This makes it possible to use resources more efficiently and avoid the need for additional farmland.

Political frameworks are accelerating the global transition toward more sustainable packaging solutions. In the European Union, for example, the Circular Economy Action Plan aims to ensure that by 2030 all plastic packaging is either reusable or fully recyclable. Since 2021, the EU Single-Use Plastics Directive (SUPD) has already banned numerous plastic single-use products, including cutlery and other food service items. Similar measures now exist in more than 100 countries.

Governments outside Europe are also tightening requirements. California’s SB 54 requires packaging to be recyclable or compostable by 2032, while several Gulf states are introducing far-reaching bans on non-recyclable single-use packaging between 2025 and 2026.

For manufacturers, food brands, and retailers, this means packaging must not only be functional and cost-efficient but also comply with strict standards – such as EN 13432 for compostability, REACH requirements for chemicals, and increasingly common PFAS-free regulations.

At the center of current innovation are natural raw materials intended to replace fossil-based plastics. Alongside established materials such as bagasse (sugarcane fiber), PLA, or paper, research institutions and industry are developing new material combinations with improved properties.

One example is composite films made from hydroxypropyl starch (HPS) and curdlan (CD). Starch offers excellent film-forming properties and strong gas barrier performance, while curdlan – an edible polysaccharide – forms heat-stable gel structures. Combining the two significantly improves mechanical stability and moisture resistance – two key weaknesses of traditional starch-based packaging.

Other natural materials are also gaining attention:

• Beeswax
• Citrus peel waste
• Milk proteins
• Gelatin

In their pure form, these materials often have drawbacks, such as low moisture resistance. When combined with functional additives or active ingredients, however, they can create packaging that is not only biodegradable but also provides antimicrobial properties or extends food shelf life.

The use of macroalgae and seagrass as packaging feedstocks is developing particularly rapidly. Algae grow quickly, require neither farmland nor freshwater, and absorb large amounts of CO₂.

Companies such as Biotic are developing biodegradable PHBV polymers from algae, a variant of PHA bioplastics. These materials can replicate the properties of conventional plastics such as polypropylene or polyester and can therefore be used in a wide range of applications – from flexible films to rigid containers.

Start-ups like B’ZEOS are also working with extruded algae pellets that can be processed into packaging films, thermoformed trays, or lids. The materials offer strong oxygen and grease barriers while also being home-compostable.

Beyond structural packaging, new single-use items are also emerging. The British company Notpla, for example, develops ice-cream spoons and pipettes made from algae that are fully biodegradable and contain no PFAS or plastic additives.

Alongside biopolymer innovation, molded fiber packaging is gaining importance. These materials are produced from plant residues such as sugarcane bagasse, wood fibers, or agricultural by-products.

One example is SupraPulp™ from the Israeli start-up W-Cycle. The material enables durable food containers made from fiber without plastic coatings while still resisting liquids, grease, and heat. The packaging can withstand temperatures from –40 to 200 °C, making it suitable for frozen products as well as hot takeout meals.

Other manufacturers are developing similar solutions. Bagasse-based burger boxes, fruit trays, and takeout packaging are already available at industrial scale and can be produced on existing machinery.

Numerous companies are advancing the market introduction of new solutions.

Mi Terro uses biomass waste to develop bio-based materials for coatings, paper packaging, and textiles. The materials are biodegradable – in some cases even marine-degradable – and can be processed using existing plastic manufacturing equipment.

Zerocircle works with algae-based coatings for paper packaging, for example for burger boxes or takeout containers. These solutions eliminate plastic liners and PFAS while still providing grease and moisture barriers.

New packaging formats are also emerging in retail. The company Plastpom developed NOPLA, a potato-starch-based material that can be processed into cutlery or straws on existing production lines and composts within a few months.

At the same time, brands such as evoware, Notpla, Reborn Material, and Cirkla are experimenting with innovative applications:

• Edible straws made from rice and tapioca
• Algae-based packaging films that dissolve in water
• Biodegradable clamshell trays for berry packaging
• Compostable disposable cutlery and food service items

The market is expanding rapidly. The biodegradable tableware segment – including plates, containers, and cutlery – is expected to grow from around $7.2 billion in 2023 to more than $16 billion by 2030.

Demand is growing particularly strongly in the food service sector, which already accounts for more than 40 percent of revenue in the sustainable food packaging market. Hospitality businesses such as restaurants, cafés, catering companies, and quick-service chains require large volumes of single-use packaging for takeout and delivery.

As food delivery platforms such as Uber Eats and DoorDash expand, demand continues to rise – while consumers increasingly expect sustainable solutions. Many hospitality businesses are therefore deliberately switching to compostable containers, plant-based cutlery, or fiber-based takeout packaging.

Food retail also plays an important role. Supermarkets and e-commerce providers are seeking environmentally friendly solutions for fresh produce, fruit packaging, or convenience products to meet both regulatory requirements and ESG targets. Retail food service is also becoming more significant – for example through takeout offers or ready-to-eat products, where sustainable packaging solutions play a key role.

Despite significant progress, compostable packaging still faces several hurdles.

Key challenges include:

• Barrier properties: Many natural materials still do not provide the same resistance to moisture, oxygen, or grease as conventional plastics.
• Stability and durability: Packaging must reliably withstand transport, storage, and varying temperatures.
• Costs and scaling: Bio-based materials are often more expensive and harder to produce at large scale.
• Production and resource consumption: Some manufacturing processes require high amounts of energy or water.
• Regulatory requirements: Food safety rules, hygiene regulations, and certifications increase complexity.

However, many developments indicate that these challenges are increasingly being overcome. For such solutions to become economically viable and widely adopted, they must reliably meet certain requirements. Many companies are already working to achieve exactly these criteria and build trust in their materials and technologies. Innovation plays a central role here: new materials, improved production processes, and optimized formulations are continuously being developed, making biodegradable and compostable packaging increasingly practical for large-scale use. Collaboration between research institutions, industry, start-ups, material manufacturers, food brands, and retailers is crucial in this process.

The transformation of food packaging has only just begun. While conventional plastics still dominate, the pressure to develop sustainable alternatives continues to grow. Compostable materials made from starch, fibers, or algae could become a realistic option in many applications. For retail and food service, this means not only regulatory compliance but also new opportunities for sustainable brand positioning. Ultimately, the decisive question will be which solutions can best combine cost, functionality, and sustainability over the long term.

Sources: Grand View Research market analysis „Eco-friendly Food Packaging Market”, Grand View Research market analysis „Seaweed Packaging Market”, Bioleader guide „Biodegradable Food Packaging Rules”, Bioleader blog post „Biodegradable Cutlery and Compostable Utensils”, GreyB Analytics blog post, Circlepac blog post