Will SB 45 Change How We Design Beverage Packaging Forever?

California just passed a law that will change how every beverage bottle looks and feels. Starting January 1, 2027, most plastic beverage containers¹ must have caps that stay attached when you open them.

SB 45² requires tethered caps³ on single-use plastic beverage containers⁴ sold in California to reduce plastic litter and increase recycling rates. The law covers most beverage bottles under 2 liters, with specific exemptions for certain products and manufacturers.

This change affects every brand owner, manufacturer, and packaging supplier in our industry. I have worked with hundreds of beverage companies over 25 years, and I know this kind of regulatory shift creates both challenges and opportunities.

What Products Must Comply with SB 45² Requirements?

Most beverage companies are asking which products fall under the new rules. The scope is broader than many people think.

SB 45 applies to plastic beverage containers with plastic caps, excluding containers of 2 liters or more, alcoholic beverages, 100% fruit juice, refillable containers, and products from small manufacturers selling fewer than 16 million units annually.

The law covers the majority of single-serve beverages we see on store shelves. Water bottles, sodas, sports drinks, energy drinks, and flavored beverages all need tethered caps³. I have seen similar regulations in Europe, and the product coverage is quite comprehensive.

The exemptions make sense from a practical standpoint. Large containers like 2-liter bottles have different usage patterns. People typically consume them at home where cap loss is less likely. Alcoholic beverages have separate regulatory frameworks. The small manufacturer exemption protects craft beverage makers who lack resources for major packaging changes.

One important detail affects high-performing recycling categories. Products that achieved over 70% recycling rates in both 2022 and 2023 get an extra year until January 1, 2028. This recognizes that some container types already work well in the current system.

How Will This Impact Manufacturing and Production Lines?

The technical changes required go far beyond just switching cap designs. Production equipment needs major modifications.

Implementing tethered caps³ requires redesigning closure specifications, modifying filling line equipment⁵, ensuring compatibility with heat sterilization processes⁶, and coordinating changes across the entire production system from cap molding⁷ to final packaging.

I have helped companies through similar transitions in other markets. The manufacturing impact touches every part of the production process. Cap molding requires new tooling designs that create the tether connection. The tether must be strong enough to stay attached but flexible enough to allow normal drinking.

Filling lines need adjustments for the new cap geometry. Tethered caps have different dimensions and weight distribution. Capping machines must handle the tether without damaging it. Quality control systems need updates to check tether integrity.

Heat treatment processes like pasteurization create additional challenges. The tether material must withstand high temperatures without weakening. Some tether designs use different plastic grades that react differently to heat cycles.

The bottle neck finish⁸ often requires changes too. The connection point between cap and bottle needs proper engineering. This might mean new bottle molds and preform designs. The entire package system needs redesign as an integrated unit.

Supply chain coordination becomes critical. Cap suppliers, bottle manufacturers, and beverage companies must align their development timelines. Any delay in one area affects the entire project.

What Are the Cost Implications for Brand Owners?

Every brand owner wants to understand the financial impact of compliance. The costs extend beyond just material changes.

SB 45² compliance involves capital investments in new tooling⁹, equipment modifications, material cost increases¹⁰, supply chain coordination¹¹ expenses, and potential market access risks for non-compliant products after the deadline.

Material costs typically increase with tethered cap designs. The tether adds plastic content to each closure. More complex molding processes often cost more per unit. However, lightweight design innovations can offset some increases by reducing overall resin usage.

Tooling investments represent the largest upfront cost. New cap molds cost tens of thousands of dollars each. High-volume products need multiple mold sets. Bottle tooling changes add similar costs. A major brand might invest millions in new tooling across their product portfolio.

Equipment modifications vary by facility. Some filling lines need minor adjustments. Others require major upgrades or replacements. The age and design of existing equipment determines modification costs.

Supply chain disruption costs are harder to quantify but equally important. Coordinating changes across multiple suppliers takes time and resources. Inventory management becomes complex during the transition period.

The biggest financial risk is non-compliance. Products that do not meet SB 45² requirements cannot be sold in California after the deadline. California represents a huge market that no major brand can afford to lose.

Smart companies start planning now to spread costs over time and negotiate better supplier terms for early commitments.

How Does This Align with Global Packaging Trends?

SB 45² follows similar regulations already implemented in other major markets. This creates opportunities for standardization.

The California law aligns with European Union tethered cap requirements¹² that took effect in 2024, enabling global brands to standardize closure designs across regions and achieve economies of scale in tethered cap production.

Europe implemented tethered cap requirements under their Single-Use Plastics Directive. The EU rules cover similar product categories with comparable technical requirements. This alignment was intentional in SB 45² development.

Global brands benefit from this harmonization. Instead of developing separate closure systems for different markets, they can use one tethered design across California and Europe. This reduces development costs and simplifies supply chains.

The timing works well for manufacturers. European implementation in 2024 gives the industry experience before California requirements begin in 2027. Lessons learned in Europe can improve California implementations.

Other U.S. states are watching California closely. Similar legislation may follow in states like New York, Washington, or Oregon. Early adopters gain competitive advantages by developing expertise with tethered systems.

Asia-Pacific markets are also considering similar regulations. Japan and South Korea have active discussions about plastic waste reduction. Australia has pilot programs testing tethered caps³. A global shift toward tethered closures seems likely.

This global trend creates opportunities for packaging suppliers who invest early in tethered cap technology and expertise.

What Should Companies Do to Prepare Now?

Successful compliance requires early planning and systematic preparation. The deadline will arrive faster than most companies expect.

Companies should immediately assess their product portfolios, engage with cap and bottle suppliers, evaluate production line requirements, develop implementation timelines, and consider pilot testing tethered designs¹³ before the January 2027 deadline.

Start with a complete product audit. List every SKU sold in California that falls under SB 45². Identify which products need changes and which qualify for exemptions. This baseline assessment guides all other planning.

Engage suppliers early. Cap manufacturers have limited development capacity. Early commitments secure priority access to engineering resources and production slots. The same applies to bottle suppliers if neck finish changes are needed.

Production planning requires detailed analysis. Each filling line needs individual assessment for required modifications. Some facilities might need equipment upgrades that take months to complete. Factor these timelines into implementation schedules.

Consider pilot testing with select products. This provides real-world experience with tethered caps³ before full rollout. Pilot programs help identify unexpected issues and refine processes.

Regulatory monitoring is essential. SB 45 implementation details may evolve through regulatory guidance. Stay current with California Department of Resources Recycling and Recovery communications.

Companies that start preparation now have the best chance of smooth compliance and may even gain competitive advantages through early market introduction of improved packaging.

Conclusion

SB 45 represents a fundamental shift in beverage packaging design that will reshape the industry permanently while creating both compliance challenges and innovation opportunities for forward-thinking companies.