This study aims to experimentally demonstrate the improved mechanical resistance performance of Stevanato’s Nexa® vials. By comparing the 2R ISO format vial in Nexa® and Fina® platforms, this study highlights how Nexa® vials provide superior mechanical resistance, which translates into several operational benefits.
Test methodology
Mechanical resistance was assessed using two quantitative techniques
Vertical Compression Test (VC): Measuring the maximum force a vial can withstand before failure when subjected to axial stress.

Burst Test (BT): performed applying internal pressure to the glass container to obtain its maximum value of internal pressure resistance.

Both tests compared Nexa® and Fina® vials. From the results achieved (VC and BT), Nexa® vials showed consistent superior mechanical resistance.
Key results
2R ISO vials
Thanks to their improved cosmetic quality and mechanical resistance, Nexa® vials provide several advantages:
- Reduced Total Cost of Ownership (TCO): Fewer cosmetic rejections and in-line breakages reduce waste of both container and final product.
- Improved Efficiency: Nexa® vials result in fewer lines-stops, downtimes and labour required to fix the filling line after breakages.
- Higher Safety: The superior mechanical strength of Nexa® vials reduces the risk of harmful products being dispersed due to container breakage.
Conclusions
This study analysed the improved mechanical resistance of Nexa® vials by comparing them to Fina® vials through vertical compression (VC) and burst test (BT). According to the results achieved, Nexa® vials have superior mechanical resistance, even three times Fina® with regards to Vertical compression (VC).