This drop test was designed by the packaging research and development team at Unilever to solve a packaging mystery: cases of Axe shampoo were arriving at retail outlets with the caps open and the shampoo leaking.

Packaging engineers performed drop tests using ProAnalyst motion analysis software. ProAnalyst's 1-D line tracking is used to divide the bottle into segments with dynamic length measurement to show the effects of the shock. As you can see in the video, there is a significant amount of deformation in the plastic bottle as it falls on a hard surface. This unacceptable amount of compression caused the bottle caps to pop open and the contents to leak out. Unilever redesigned the product packaging to solve the problem.