From the aesthetic point of view, the round sanitizer empty bottle is more in line with the general public's aesthetic and is more attractive.

From the psychological point of view, the round plastic bottle is more likely to make people feel comfortable with the product, and it is not easy to make people feel resistant and uncomfortable.

From the packaging process, the round hand sanitizer bottleis relatively simple to make, while other shapes of plastic bottles require additional molds, and the process is complicated.

In terms of cost, the circular area is the largest, which can save raw materials. It also does not take up space during transportation, which can reduce production costs.

In terms of user experience, the round shape PET bottle is convenient to hold, and the grip is more comfortable.