I was having the screw on tops of my containers crack now and then after I shook the contents in Superman-like fashion. I needed to shake hard but the cheap plastic wasn't holding up to this.
then, by accident, I found that if I rotate the container so the top is 90° to the ground I could really shake hard and the top and bottom sides of the container were taking all the Force. Since the container's sides are thicker than the top the cracking has been eliminated.