Hollow paper cup is a specially designed paper cup with the following characteristics:

1. Hollow structure: Hollow Paper Cup is designed with a hollow structure, that is, an air gap is formed between the inner and outer layers of the paper cup. This design aims to reduce the temperature conduction inside and outside the paper cup, so that the outer layer is not affected by the hot liquid on the inner layer and is not easy to heat up, improving the comfort of the hand and reducing the risk of burns.

2. Heat insulation performance: Due to the existence of the hollow structure, Hollow Paper Cup has better heat insulation performance. It can effectively slow down the temperature conduction, so that the hot drink can be kept hot for a long time in the paper cup to avoid scalding the mouth.

3. Environmentally friendly and biodegradable: Hollow Paper Cups are usually made of paper materials such as pulp or cardboard, which have good biodegradable properties. After use, paper cups can be recycled or decomposed naturally, with less impact on the environment.

4. Reinforced structure: In order to ensure the strength and stability of the Hollow Paper Cup, a layer of reinforced cardboard or paper grid structure is usually added between the inner and outer layers of the paper cup. This design can improve the load-bearing capacity of the paper cup and avoid deformation or leakage.

5. Appearance innovation: Hollow Paper Cup can have certain innovations in appearance design. It can be decorated by printing, colored paper, texture, etc., so that the paper cup is more beautiful, and it can produce better effects when it is promoted by merchants and used by users.

It should be noted that Hollow Paper Cup may not be suitable for all scenarios and needs, and its special design may also lead to increased costs. Therefore, when choosing paper cups, it is necessary to comprehensively consider factors such as usage scenarios, product costs, and environmental protection requirements.