1. Because most plastic bottles are PET bottles, which are blow-molded, round shapes are best produced in batches. Other shapes including square ones are not easy to blow, and the craftsmanship is difficult to guarantee, even like ice tea. It is a square bottle, in fact, the edges are rounded, and it is impossible to be completely square.
2. The round shape is more in line with the structure of the human body, which is convenient for grip.
3. Round bottles are easy to produce, save materials, have the same circumference, and have a large round area. Like purified water and cola, the cost of packaging materials is higher than the cost of the stuff. Saving this point can save a lot of money.
4. In addition, round bottles are best used on automatic assembly lines. Filling, automatic labeling, and packaging can all be automated, so round beverage bottles are more common.
