Unexpected surprise, an accidental failure

I got a little surprise when I opened a box containing some candles' material.  Something happened to one bottle of candles' scent.  Here is the bottle, the part for the drop is completely useless:

I don't know how it happened.  It is pretty ripped out. Here is the result in the box:

It is what happen when it's too much time since the last time I look inside my boxed stuff.  A periodical safety look could solve this problem, I guess.  I am learning by experience, after all.