Deflate in stainless steel bottle are generally common particularly on the cap due to the falling of the bottle on the floor results in poor appearance of the bottle. Therefore, this study aimed to investigate the impact behaviour and deformation characteristics of stainless steel water bottles under drop test simulations. Using the Finite Element Analysis (FEA) method, various parameters including thickness, angle, and filling status of the bottle were modified to assess their influence on deformation and plastic strain. The simulations were performed using ANSYS Explicit Dynamics software. The results revealed that as the impact angle increased, the total deformation of the bottle exhibited a significant increase, while the equivalent plastic strain decreased. Among the different cases analysed, the bottle with a 2.5 mm cap thickness and a 0.5 mm body thickness, when filled with water, exhibited the least average total deformation and equivalent plastic strain. These findings highlight the importance of considering the design parameters of stainless steel bottles to minimize deformation during impact events. The study demonstrates the utility of drop test simulations and Finite Element Analysis in evaluating and optimizing bottle designs, reducing the need for costly physical prototypes.