Question about splitting cups

I bought one of the "trial" LadyCups just because I've wanted to try one out for a long time but could never justify the price if I didn't know if it would work out for me or not.  I'm okay with the fact that it will probably split on me as long as I can get a cycle-ish to try it out.

But here's my question: is EVERY cup in that batch defective?  As in, is there a chance that one might buy a trial cup and then it lives the normal life span of any other menstrual cup?  Or are you pretty much guaranteed a split cup?

Again, I'm fine with the idea of my cup splitting, I'm just curious if it's possible to win the cup lottery when it comes to these trial cups.