For cafés, bubble tea shops, juice bars, food trucks, and large-scale catering operations, cup selection is not a cosmetic decision — it directly affects breakage rates, cold-chain performance, branding impact, and end-of-life recyclability.
A 32oz (roughly 946 ml) PET cold drink cup is a large-format, single-wall beverage cup thermoformed from food-grade polyethylene terephthalate (PET) sheet. It is designed to hold cold, non-carbonated or lightly carbonated beverages — iced coffee, bubble tea, smoothies, slushies, soft drinks, and fruit juices — where transparency, rigidity, and resistance to condensation are essential. The 32oz size sits at the upper end of the standard cold-cup range (commonly 12oz–32oz), making it the format of choice for oversized or multi-layered drinks, festival and stadium concessions, and value-sized beverage programs.
PET (polyethylene terephthalate, resin identification code 1) is a thermoplastic polyester valued in beverage packaging for a specific combination of physical properties. Compared with other food-contact plastics, PET offers:
Optical clarity — PET has very low haze, allowing full visibility of drink color, ice ratio, and layering (important for tea, smoothies, and layered cocktails).
Mechanical rigidity — a higher tensile and flexural modulus than PP or PLA at equivalent wall thickness, reducing the amount of material needed to resist crushing and deformation.
Crack and impact resistance — PET remains dimensionally stable and resists stress-cracking under refrigeration and repeated handling, which is why it performs well for cups that travel through drive-thru service or delivery.
Chemical inertness — PET does not react with acidic beverages (citrus juices, carbonated drinks) or interact with flavor compounds, preserving taste integrity.
Recyclability — PET is the most widely recycled plastic globally and is accepted in most municipal recycling streams under resin code 1.
Food-grade PET used in drink cups is manufactured to comply with food-contact regulations such as the U.S. FDA's 21 CFR 177.1630 (polyethylene terephthalate polymers) and the EU's Regulation (EU) No. 10/2011 on plastic materials intended to come into contact with food. Reputable manufacturers source virgin or FDA/EU-compliant recycled PET resin and maintain traceability records for each production batch.
| Property | PET | PP | PLA | RPET |
|---|---|---|---|---|
| Clarity | Excellent | Fair (translucent) | Excellent | Good, slight tint |
| Rigidity | High | Moderate | Moderate-High | High |
| Cold-drink suitability | Ideal | Suitable | Ideal (not for hot use) | Ideal |
| Heat tolerance | Low-Moderate | Moderate-High | Low | Low-Moderate |
| Recyclability | Widely recycled (code 1) | Recyclable (code 5, less common) | Industrially compostable | Post-consumer recycled content |
| Typical use case | Cold beverages, smoothies, teas | Cold & some hot use | Eco-focused cold beverage programs | Sustainability-branded programs |
For businesses considering alternative resins, Gaokai's PLA Series and RPET Series pages outline compostable and recycled-content alternatives to standard PET.
The table below reflects the dimensional and packaging data for the GK117/32C model, the standard 32oz reference SKU.
| Specification | Value |
|---|---|
| Item No. | GK117/32C |
| Product Name | 117/32oz Cup |
| Nominal Capacity | 32 oz (≈946 ml) |
| Unit Weight | 22.5 g |
| Top Caliber (Rim Diameter) | 116.85 mm |
| Bottom Diameter | 88.3 mm |
| Overall Height | 145.3 mm |
| Packing (Sleeve) | 25 pcs × 20 sleeves |
| Packing (Carton) | 500 pcs/ctn |
| Material | Food-grade virgin PET |
| Lid Compatibility | Dome lids and flat lids (matched rim tolerance) |
Large-format PET cold cups are typically produced through sheet extrusion followed by thermoforming, a two-stage process:
Extrusion: PET resin pellets are melted and extruded into a continuous flat sheet of controlled thickness and optical clarity, then cooled on chill rollers to lock in dimensional stability.
Thermoforming: The cooled PET sheet is reheated to its forming temperature and vacuum- or pressure-formed over a cup-shaped mold, then trimmed to the finished rim and base geometry.
Trimming & inspection: Excess sheet (skeleton waste) is separated and typically reclaimed for reprocessing, while finished cups pass through dimensional and visual inspection — checking rim roundness, wall thickness consistency, and clarity — before packing.
Stacking & packaging: Cups are nested into sleeves of a fixed count (e.g., 25 pcs/sleeve) to control stacking height and prevent rim damage during transport, then cartoned for shipment.
Consistent wall thickness across the forming process is what determines a cup's crack resistance and stacking strength — two of the most common failure points buyers encounter with lower-quality suppliers.
The 32oz format is chosen across a wide range of operating environments:
Bubble tea and juice bars — where large capacity accommodates tapioca pearls, fruit pulp, and toppings without sacrificing beverage volume.
Food trucks and fast-casual chains — where fast service and minimal refills matter during peak hours.
Stadiums and outdoor events — where shatterproof PET is safer than glass and more presentable than foam.
Catering and party supply — where a single large cup reduces the number of refill trips needed per guest.
PET's resin identification code 1 status means it is accepted by the large majority of municipal curbside recycling programs in North America, Europe, and much of Asia, and is one of the most commonly reprocessed plastics into new bottles, sheet, and fiber. For operators building sustainability messaging around packaging, it is worth noting the practical distinctions:
Standard PET cups are recyclable but made from virgin resin.
RPET cups (see the RPET Series) incorporate post-consumer recycled content, reducing new-resin demand.
PLA cups (see the PLA Series) are derived from renewable plant starches and are industrially compostable, but require access to industrial composting facilities to break down effectively — they should not be placed in standard PET recycling streams.
Operators should select the resin that matches their local waste infrastructure rather than assuming any single "eco" material is universally better — a compostable cup with no composting access performs worse environmentally than a properly recycled PET cup.
Reliable cold-cup manufacturing depends on consistent raw-material sourcing and in-process inspection. Key checkpoints in a well-run production line include incoming resin verification, sheet-thickness monitoring during extrusion, post-forming dimensional sampling (rim diameter, wall thickness, base flatness), and drop/stack-load testing on finished cups. Buyers evaluating suppliers should ask for documentation on food-contact compliance (such as FDA 21 CFR or EU 10/2011 conformity), batch traceability, and factory production capability — details typically outlined on a supplier's About Us and Why Choose Us pages.
Is a 32oz PET cup suitable for hot beverages?
No. PET has a relatively low heat-deflection temperature and is intended for cold and ambient-temperature beverages only.
What lids fit the GK117/32C cup?
The rim is designed to accept standard dome or flat lids matched to a 116.85 mm caliber for a secure, spill-resistant seal.
Can the cup be custom-branded?
Yes — PET's surface accepts offset printing, screen printing, and label application, and manufacturers can typically produce custom sizes based on customer drawings or samples.
Is the cup recyclable?
Yes. As resin code 1 material, PET cold cups are accepted in most standard recycling programs (rinse before disposal where required locally).
