What plastic materials are approved for hot drink cup production?

Choosing the right plastic material for hot drink cup production is one of the most consequential decisions a packaging manufacturer can make. The material must withstand elevated temperatures without deforming, meet strict food-safety regulations, and perform reliably on high-speed thermoforming lines. With several approved options available and growing pressure to adopt more sustainable alternatives, understanding how each material behaves in practice is essential for making informed procurement and production decisions.

This article walks through the key plastic materials used in hot drink cup production, from the regulatory framework that governs their use to how each option performs on a thermoforming line. Whether the focus is on maximizing output, ensuring compliance, or transitioning toward greener materials, the information below provides a solid foundation for that decision.

Food-safety standards that govern hot drink packaging

Before any plastic material can be used for hot drink packaging, it must satisfy food-contact regulations in the relevant markets. In the European Union, Regulation (EC) No 1935/2004 establishes the general framework for all materials intended to contact food, while Regulation (EU) No 10/2011 sets specific migration limits for plastic materials and articles. In the United States, the FDA governs food-contact substances under 21 CFR, with specific provisions for materials exposed to high temperatures.

For hot beverages, the critical factor is migration: the transfer of chemical substances from the plastic into the drink. Regulators set overall migration limits and specific migration limits for individual substances. Materials used in hot cup production must demonstrate that migration remains within safe thresholds even at temperatures typical of freshly brewed coffee or tea, which can exceed 80°C. Manufacturers sourcing materials or operating in multiple markets should verify compliance with both EU and local regulations, as requirements can differ significantly.

PP, PS, and PET: How the main materials compare

The three most widely used food-safe plastics for hot beverage cups each bring distinct characteristics to the table. Understanding their differences helps production teams align material selection with performance requirements and end-use conditions.

Polypropylene (PP)

PP is the dominant material for hot drink cup production and for good reason. It offers excellent heat resistance, typically maintaining structural integrity up to around 120°C, making it well suited for cups holding hot coffee, tea, or soup. PP is also lightweight, chemically resistant, and widely accepted under food-contact regulations in both the EU and US markets. Its rigidity-to-weight ratio makes it a practical choice for thermoformed cups where dimensional stability under heat is non-negotiable.

Polystyrene (PS)

PS has historically been used in disposable hot drink cups, particularly in foam (expanded polystyrene) form, where its insulating properties are an advantage. However, standard PS has a lower heat deflection temperature than PP, and its use in food-contact applications is subject to increasing regulatory scrutiny in several markets. For thermoforming applications involving hot liquids, PS is less favored today than it once was, partly due to performance limitations and partly due to growing legislative restrictions on single-use plastics.

Polyethylene Terephthalate (PET)

Standard amorphous PET (APET) is not well suited for hot drink applications because it softens at relatively low temperatures. However, crystalline PET (CPET) performs significantly better under heat and is used in applications such as hot-fill trays and lids. For hot drink cups specifically, PET is less common than PP, though its clarity and recyclability make it attractive for cold beverage and lid applications where heat resistance is less critical.

How material choice affects thermoforming performance

Material selection does not just affect the end product; it directly influences how a production line runs. Each plastic material behaves differently during the thermoforming process, affecting cycle times, tool wear, energy consumption, and overall output quality.

PP, for example, requires precise temperature control during forming because its processing window is narrower than some other materials. It demands consistent sheet heating to avoid uneven wall thickness in the finished cup. When forming conditions are well controlled, PP delivers excellent dimensional accuracy and surface quality. PS, by contrast, has a broader processing window, which can make it somewhat easier to run on older or less precise equipment, though this advantage is offset by its other limitations.

PET presents its own challenges: it is sensitive to moisture and must be dried before processing to prevent degradation. CPET requires higher forming temperatures and careful management of crystallization. For packaging producers running high-speed lines, these material-specific requirements mean that machine capabilities, tooling design, and process parameters must all be calibrated to the chosen material. Switching materials without adjusting the process can lead to increased scrap rates, inconsistent quality, or accelerated tool wear.

Sustainable alternatives: PLA and recycled PET in hot cup production

Sustainability considerations are reshaping material choices across the packaging industry, and hot drink cup production is no exception. Two alternatives attracting growing interest are polylactic acid (PLA) and recycled PET (rPET).

PLA is a bio-based, compostable polymer derived from renewable sources such as corn starch or sugarcane. It can be processed on thermoforming equipment and is increasingly specified for packaging with sustainability credentials. However, standard PLA has limited heat resistance, with a glass transition temperature that makes it unsuitable for genuinely hot drinks without modification. Heat-resistant PLA grades are available but come at a higher cost and may require adjusted processing conditions. PLA is best suited for cold or mildly warm applications unless a specifically heat-stabilized grade is used.

Recycled PET (rPET) is gaining traction as a more circular alternative to virgin PET. Food-contact approved rPET, produced through certified mechanical or chemical recycling processes, can be used in thermoforming applications. The EU has established specific regulations governing the use of recycled plastics in food-contact materials, requiring that recycling processes be authorized and that migration safety be demonstrated. For hot drink applications, the same heat-resistance considerations that apply to virgin PET apply equally to rPET. The key advantage of rPET lies in its lower carbon footprint and its alignment with extended producer responsibility frameworks taking effect across European markets in 2026 and beyond.

Matching the right material to your production line

There is no single best material for hot drink cup production; the right choice depends on the specific application, the target market, the regulatory environment, and the capabilities of the production equipment. PP remains the most versatile and widely approved option for genuinely hot beverage cups, offering the best combination of heat resistance, processability, and regulatory acceptance. For producers prioritizing sustainability, rPET and heat-resistant PLA grades offer viable paths, provided the production line and tooling are configured to handle their specific requirements.

When evaluating a material change or planning a new production line, it is worth considering not just the material cost but the total cost of ownership: scrap rates, cycle times, energy consumption, and maintenance intervals all vary by material. A material that is cheaper per kilogram but runs at lower efficiency or generates more waste may not deliver the expected savings. Working closely with equipment suppliers and material manufacturers during the specification phase helps avoid costly mismatches between machine capabilities and material behavior.

How GABLER Thermoform supports your hot drink cup production

At GABLER Thermoform, we understand that material selection and machine performance are inseparable. Our thermoforming systems are engineered to handle the full range of approved materials for hot drink packaging, from PP and CPET to PLA and rPET, with the precision and stability that high-quality cup production demands. Here is what sets our approach apart:

Optimized forming technology: Our machines feature a fixed top yoke and a tilting bottom table, ensuring optimal parallelism and consistent wall thickness across every cycle, regardless of the material being processed.
High output performance: With up to 20 per cent higher output than comparable systems, our lines deliver lower costs per unit and a faster return on investment.
Sustainable material compatibility: Our systems are designed to process biodegradable PLA foil and recycled PET plastics, supporting your transition to more sustainable packaging materials.
Industry 4.0 readiness: State-of-the-art sensor technology and remote access allow precise process monitoring and adjustment, which is especially valuable when running demanding materials with narrow processing windows.
Full-service support: From installation and commissioning through to spare parts supply and ongoing customer service, we provide a complete support package so production teams can focus on output, not troubleshooting.

Whether you are setting up a new line for thermoformed cup production or optimizing an existing one for a new material, our team is ready to help. Contact GABLER Thermoform to discuss your specific production requirements and find the right solution for your application.