The measurement of the resistance of bottles and vials to internal pressure stress is of particular importance in the case of containers destined to contain carbon dioxide rich beverages (like soda-pops, beer, sparkling wines, champagne, etc.), but is often applied also to other containers as it is capable of subjecting the entire bottle to tensile stress (resulting from the hydrostatic pressure), which benefits the reliability of performance control, since this way all possible defects / stress concentrators are severely stressed.

The test is carried out according to the UNI EN ISO 7458 standard: 2004 Glass containers — Internal pressure resistance — Test methods, or according to method B of ASTM C 147-86 (2005) Standard Test Methods for Internal Pressure Strength of Glass Containers.