The so-called special-shaped glass bottles refer to various glass bottles with non-circular cross sections, such as three-way bottles, square bottles, eight-square bottles, and oval bottles. Through the unique bottle shape design, the glass bottle not only meets the requirements of product packaging, but also makes the container have a certain art, decoration and display value, to meet the consumer's spiritual and psychological needs. In addition, special-shaped bottle is also a relatively good pseudo-functional in technology, most of the abnormal bottle structure is complex, processing technology requirements are high, mold making is difficult, prevention and control has a certain degree of difficulty, which makes the shaped bottle has a technical anti-counterfeiting function.
The bottom of the glass bottle is generally designed to be concave, which can reduce the contact point in the contact plane and increase the stability. The bottom of the bottle and the root of the bottle adopt a circular arc transition with a large arc of transition, which is beneficial to improving the strength of the bottle. However, if the arc is too large, the support area will be reduced and the stability of the glass bottle will be reduced. Under the certain quality of glass bottles, the minimum thickness of the bottom of the bottle is the design requirement. The thickness ratio of the bottom of the bottle is stipulated, and the difference between the bottle thickness and the smaller thickness is required to reduce the internal stress.