Hoffer talks about making sustainability part of the design process rather than an afterthought. When it comes to flexible packaging, what does ‘sustainable by design’ actually look like in practice, and where do you think the biggest opportunities still lie?
For Hoffer Plastics, “sustainable by design” means bringing sustainability into the conversation from the very beginning, alongside performance, manufacturability, cost and the consumer experience. It’s asking: How can we accomplish what this package needs to do while using material as efficiently as possible and considering what happens at end of life?
In flexible packaging, that means looking at the entire package as a system. The pouch, spout and closure all matter. It can mean designing around compatible mono-material solutions where possible, lightweighting components, optimizing material use and evaluating recycled or alternative resins where appropriate. It also means considering how efficiently each component can be manufactured. A design isn’t truly sustainable if it creates excessive scrap or compromises performance.
That’s why collaboration between manufacturing and sustainability expertise is so important. Looking at material behavior, component geometry, tooling, process efficiency and environmental considerations together creates more opportunities to improve the package without sacrificing performance.
One of the biggest opportunities in flexible packaging is continuing to optimize the entire system rather than individual components in isolation.
Ultimately, sustainable design is about making smarter decisions earlier and continually asking where we can use less, waste less and design better.
Caps and spouts might be small, but Hoffer points out that they can account for as much as 20% of a package’s plastic weight. Are these little components actually one of the packaging industry’s biggest overlooked sustainability opportunities?
Absolutely. Caps, spouts and closures should be an integral part of the conversation, as they play a critical role in the performance and sustainability of the complete package. When these components are produced by the millions or billions, improvements at the component level translate into meaningful environmental benefits at scale.
Through thoughtful design and precision manufacturing, we can lightweight components, optimize material use and refine geometry while maintaining the performance, safety and functionality the package requires.
We also have to look beyond the individual component. Material compatibility and how the cap, spout or closure works with the rest of the package at end of life matter as well.
The opportunity is to look at the complete package as a system rather than treating the cap, spout or closure as an afterthought. Bringing those components into the conversation earlier creates more opportunities to reduce material use, improve compatibility and advance overall package sustainability.
Hoffer has been developing mono material solutions where the pouch, cap and spout can all be made from compatible PE or PP materials. How close are we to reaching a point where consumers can simply put the whole pack into recycling without having to play packaging detective first?
That’s certainly the goal: making recycling simpler and more intuitive for consumers so they don’t have to be packaging experts to make the right decision.
Mono-material design is an important part of getting there. Hoffer Plastics has been collaborating across the packaging value chain to advance caps and spouts that are compatible with PE or PP pouch structures. When those components are designed to work together from a material standpoint, it creates greater opportunity for the complete package to be designed with recyclability and end of life in mind.
Designing for recyclability is one part of the equation. Having the infrastructure to collect, sort and process that packaging effectively is another, which is why progress requires collaboration across the value chain.
Hoffer can continue bringing our expertise in caps, spouts, materials and manufacturing to those collaborations, while working alongside pouch and film suppliers, brands, recyclers and other industry stakeholders toward solutions that work across the complete package. The closer those efforts align, the closer we get to a consumer experience where recycling the whole package is simple and intuitive.
Hoffer has managed to redesign its P-15 Trust-T-Lok® cap using 46% less material. When lightweighting packaging that dramatically, how do you decide when you’ve hit the sweet spot between using less plastic and maintaining performance, safety and convenience?
Lightweighting is an engineering optimization exercise. Depending on the application, it can involve redesigning wall sections or geometry, changing structural features, improving material flow or evaluating different resin grades or materials. The objective is to use geometry, material properties and scientific molding principles to optimize the component so it can achieve its required performance with less material.
The sweet spot is achieved when you’ve reduced material while maintaining the performance and safety features the application requires, along with a repeatable manufacturing process.
From a scientific molding perspective, we assess how design changes affect the molding process and overall process window. The goal is to ensure the component can be manufactured consistently and reliably at scale.
Validation is equally critical. Depending on the application, that can include dimensional testing, leak and seal integrity, torque, retention, impact and functional testing. For a closure, we also look beyond the component itself to understand how it performs as part of the complete package.
The P-15 cap is a strong example of what that approach can achieve. Reducing material by 46% required us to determine where material was functionally necessary and how geometry and material properties could be used to maintain performance with less resin. That required collaboration across engineering, tooling, manufacturing and quality. Together, those teams brought the technical expertise needed to evaluate and refine the design and establish a repeatable molding process. Rigorous testing and validation ensured the cap continued to deliver the critical performance and safety features required for the application, including tamper evidence and its choke-resistant design.
Hoffer has worked with suppliers and customers to incorporate up to 30% post consumer recycled material into certain packaging applications. What is currently stopping the industry from pushing that percentage significantly higher? Is it technology, availability, regulation, cost, performance, or a mixture of all five?
It’s really a combination of all five. Technology, availability, regulation, cost and performance can each influence how much PCR is appropriate, and the considerations vary by material and application. In some applications, recycled content can go higher than 30%, while in others one or more factors may influence what level is practical.
From a manufacturing standpoint, PCR can introduce greater variability than virgin resin. As you increase recycled content, you have to understand how that affects material flow, dimensional consistency, mechanical properties and the stability of the molding process. The question isn’t just, “Can we mold it?” It’s whether we can mold it consistently and whether the finished component will continue to meet its performance requirements.
Aesthetics matter too. PCR can introduce variations in color, clarity or appearance that may be perfectly acceptable in one application but not another. Food-contact packaging is a good example of why PCR isn’t a one-size-fits-all solution. Material purity, potential contaminants, performance requirements and the intended application all have to be considered when determining whether recycled content is appropriate and at what level.
In highly regulated or performance-critical applications, such as certain medical components, material specifications, traceability, safety and regulatory requirements can further limit whether PCR is appropriate. Availability, quality and cost at scale are also part of the equation. Manufacturers need a reliable supply of PCR that consistently meets the specifications the application requires.
The goal shouldn’t be to reach a specific PCR percentage across the board. It should be to determine the highest appropriate PCR content for a particular application while maintaining safety, performance, quality and manufacturability.
One of the interesting things about Hoffer’s approach is the argument that circular packaging cannot be created by one company alone. Resin suppliers, converters, machinery manufacturers, brands, recyclers and consumers all have a part to play. If you could magically get everyone in that chain around one table tomorrow, what is the first problem you would want them to solve together?
The first priority would be creating greater alignment between how we design packaging for recyclability and how that packaging will be collected, sorted and processed at scale.
The challenge is that circularity is complex and requires many interconnected parts of the system to advance together. Packaging innovation, recycling infrastructure, collection and sorting capabilities, markets for recycled materials and consumer participation each have their own technical, economic and practical considerations.
There’s already meaningful collaboration happening across the value chain. The opportunity is to build on that progress by creating even greater alignment around the future state we’re working toward. What materials and package formats do we want moving through a circular system five or ten years from now? What will recyclers need to efficiently sort and process them? What will suppliers, manufacturers and brands need to do to get there? And how do we make the process simple and intuitive for consumers?
Scale and economics are also important. A package can be designed for recyclability, but that alone doesn’t create the consistent material volume or economic value needed for it to be collected and processed at scale. There also needs to be a viable market for the recycled material once it’s processed, creating the economic foundation needed to support circularity at scale.
Hoffer has developed a greenhouse gas emissions calculator looking at everything from electricity and water consumption to waste, transportation and upstream and downstream distribution. Has collecting that level of data revealed anything surprising about where the environmental footprint of packaging and its production really come from?
What the greenhouse gas emissions calculator has really given us is much more granular visibility into where emissions occur across our operations and the broader value chain. Rather than revealing a completely unexpected source of emissions, it has reinforced how many different factors contribute to our carbon footprint and the importance of measuring them intentionally.
You can’t improve what you don’t measure and having that data allows us to make informed decisions about where to focus our efforts. By intentionally measuring beyond material use and waste, including electricity and water consumption, transportation, energy, and upstream and downstream distribution, we’ve developed a more complete picture of our overall footprint.
Most importantly, we’re already using that data to inform strategic initiatives aimed at reducing emissions year over year, with the long-term ambition of achieving carbon neutrality. It helps us identify and prioritize opportunities across the organization, from process optimization, waste reduction and energy efficiency to decisions around materials and transportation. It also helps inform strategic investments in machinery, infrastructure, technology and innovation that can improve efficiency and reduce emissions over time.
There is often a perception that making packaging more sustainable means compromising somewhere else, whether that is performance, safety, shelf life, appearance or cost. What is one sustainability trade off that you think the packaging industry has largely solved, and which one is still keeping engineers awake at night?
One of the biggest advancements we’ve seen is that sustainability doesn’t have to mean compromise. In fact, it can be a catalyst for better packaging. Advances in part design, material science, simulation, tooling and scientific molding give us more opportunities to engineer components that use less material while still meeting the safety, functionality and performance requirements of the application.
Lightweighting is a great example of a trade-off the industry has largely overcome. It’s not simply about making a part thinner. It’s about understanding where material is needed, then optimizing the part design and tooling accordingly. Scientific molding helps validate that the component can be manufactured consistently and perform reliably. The result can be a better-optimized component, not simply a lighter one.
What engineers are still solving is how to expand the use of more sustainable materials and technologies across a wider range of applications without compromising the performance, safety, appearance or manufacturability those applications require. A solution may work well in one application but face very different requirements in another, so there isn’t a single material or approach that works everywhere.
Cost is part of that challenge too. A sustainable solution can work technically, but it also has to be commercially viable. Greater scale, stronger supply, advances in material science and recycling technology and more efficient manufacturing can all help close the cost gap and make sustainable solutions more competitive.
Hoffer’s sustainability work now stretches from recyclable and lightweight packaging designs to regrind programmes, closed loop water systems, energy efficient machinery and ISO 14001 certification. How important is it for packaging manufacturers to look beyond the sustainability of the pack itself and consider the footprint of how that packaging is actually produced?
It’s essential. We believe you have to look at both the sustainability of the package and the footprint of how it’s produced. A lightweight or recyclable design is important, but it’s only part of the equation.
That broader perspective has been shaped by how Hoffer Plastics has approached manufacturing across three generations. With more than 70 years of injection molding experience, using resources efficiently, minimizing waste and continually improving how we manufacture have been foundational to our operational philosophy. As technologies and capabilities have evolved, that philosophy has remained a constant, providing a lens through which we evaluate decisions and identify opportunities to improve operational efficiency and reduce our environmental impact.
Today, that perspective extends across the organization. Our closed-loop water system has reduced water usage by 50%. Regrind programs help keep usable material in the process and scrap out of landfills, while process optimization helps minimize scrap in the first place. Energy-efficient machinery reduces energy consumption while increasing production efficiency and output.
We also continue investing in the systems and technologies behind that progress. Hoffer reinvests up to 10% annually in machinery, infrastructure, technology and innovation, while ISO 14001 provides a framework for measuring our impact, identifying opportunities and driving continuous improvement.
Ultimately, sustainable packaging and sustainable operations have to advance together. It’s about continually improving both what we produce and how we produce it.
Finally, let’s jump forward ten years. If we opened a typical supermarket cupboard in 2036, what would you love to see disappear from packaging, and what innovation would you hope had become completely normal by then?
If we opened the cupboard in 2036, one innovation we’d love to see become completely normal is the flexible spouted pouch refill. Instead of replacing a durable primary package every time, consumers could replenish it with a lightweight refill, reducing the amount of packaging material needed over time.
More broadly, we’d hope to see packaging continue evolving toward the most material-efficient format for each application. In some cases, that may mean lightweighting a rigid package. In others, it may mean moving to a flexible spouted pouch that uses less material and occupies less space than a comparable rigid container. Those efficiencies can extend across warehousing and transportation, helping lower associated costs, reduce the number of truckloads required and create opportunities to lower transportation-related emissions across the supply chain.
We’d also hope to see pouches, caps and spouts continue evolving toward compatible mono-material systems designed with recyclability in mind, alongside continued advances in the collection, sorting and recycling systems that support them.
Cost will be important to making these solutions mainstream. Sustainable packaging has to make sense environmentally, technically and economically. Continued innovation, greater scale and manufacturing efficiency can help close the cost gap and support broader adoption.