vulnerable hard plastic tips are easy to break.
If this falls on its side, the hard plastic tip can easily break in a way that the threads of the part stuck inside the device are not removable without damaging it.  Mine tipped over on the bathroom counter, once, and the tip broke, and when i dug the threads out a new tip cant be inserted without leaking badly.  So I got three moths use and it is now useless.
Rating: 3 stars