White Cardstock Double‑Walled Air‑Insulated Paper Cup for Milk Tea and Coffee –

White Cardstock Double‑Walled Air‑Insulated Paper Cup for Milk Tea and Coffee – Heat Insulation and Anti‑Scald

The white cardstock double‑walled paper cup is a disposable drinking vessel specifically designed for take‑away hot beverages such as milk tea, coffee, and other hot drinks. It is made from food‑grade white cardstock and features a waterproof inner lining that is safe and odourless, allowing direct contact with hot liquids. Its core structure consists of two paper walls (inner and outer) with a stable air layer trapped between them. Air has an extremely low thermal conductivity coefficient of approximately 0.024 W/(m·K), far lower than paper or plastic. When a stationary air gap is formed between the two walls, heat transfer is significantly hindered. This physical design, which relies solely on the air layer without needing additional coatings or increased material thickness, achieves remarkable thermal insulation.

In practical use, this advantage is particularly evident. Experimental data show that at a room temperature of 25 °C, when serving milk tea at 90 °C, the outer wall temperature of the double‑walled cup is only 43 °C after one minute and remains stable at around 41 °C after five minutes. With hot water at 80 °C, the outer surface temperature is kept below 40 °C. In contrast, a conventional single‑wall paper cup, when in contact with liquids above 60 °C, quickly transfers heat through the paper fibres, making the outer surface uncomfortably hot to the touch; with milk tea at 90 °C, the outer wall temperature shoots up to 62 °C within just one minute. Overall, the surface temperature rise of the double‑walled cup is about 40 % lower than that of a single‑wall cup. The user feels only a pleasant warmth without any risk of burning, and no additional sleeves or insulating holders are required. This not only improves the drinking experience but also reduces the establishment’s costs for purchasing and stocking extra accessories.

The cup body is made of high‑stiffness food‑grade white cardstock, with an inner PE lining that complies with food‑contact safety standards. This lining effectively prevents liquid penetration, ensuring that the beverage does not come into direct contact with the paper fibres, thereby avoiding off‑flavours or the release of pulp‑derived substances. The product strictly adheres to GB 4806.8‑2022 (National Food Safety Standard for Paper and Paperboard Materials and Products in Contact with Food) and GB/T 27590 (Standard for Paper Cups). The base paper must be food‑grade, fluorescent‑free white cardstock; the use of recycled paper or non‑food‑grade paper is strictly prohibited, and fluorescence testing ensures that no optical brighteners are added.

The double‑wall structure not only insulates against heat but also significantly enhances the mechanical strength of the cup. The two layers and the air gap improve resistance to crushing, preventing deformation when filled with hot liquid. The rim is formed with a precision rolled edge, and the bottom is sealed using reinforced lamination technology, which prevents leakage and maintains shape even under normal handling. The total thickness of the cup is approximately 0.3‑0.4 mm, with a grammage of 250‑300 g/m², providing a solid yet not heavy feel. The clean white surface is attractive and can be printed over the entire area with sharp graphics, no wrinkles, and vivid colours, allowing customisation with brand logos, patterns, or product information.

This product is suitable for a wide range of hot beverages, including freshly brewed coffee, flavoured lattes, Hong‑Kong‑style milk tea, hot fruit teas, ginger tea with brown sugar, hot chocolate, and breakfast soya milk. Whether in chain coffee shops, milk tea outlets, convenience stores, office pantries, exhibition events, or delivery services, the air‑insulating layer helps to maintain the beverage temperature and reduce heat loss. During peak morning hours, drinks can be served quickly without waiting for them to cool down; for deliveries, the cup does not leak or burn through the paper bag; for in‑store service, it leaves no water rings or heat marks on the table.

From an environmental perspective, white cardstock is a recyclable paper‑based material. Compared with traditional foam plastic cups or cups with plastic coatings, this cup is easier to incorporate into paper recycling systems. Some premium versions use PLA biodegradable coatings, further enhancing their eco‑friendliness. Choosing the white cardstock double‑walled cup satisfies both operational needs and the growing consumer demand for sustainable products.

In terms of market trends, the global paper cup market reached approximately USD 7.2 billion in 2025 and is projected to grow to USD 9.3 billion by 2034. Products that combine safety and environmental responsibility have become the mainstream, and the demand for eco‑friendly paper cups continues to rise.

Product Specifications

Note: The capacities, dimensions, and grammage listed above are typical ranges; exact parameters can be tailored to customer requirements, with production possible across the 4‑22 ounce capacity range.