I use it simply for when menstruation cramps are too much and it is a discreet aid nobody notices, unlikes a waterbottle that have the possibility to leak water. It is incredibly handy and I will definitely buy a new one once my current one has completed its life.
After 3 years of use, the coating will chip off. The bare metal does not form a problem but it looks worn.
I have dropped it twice when flipping a blanket and the halves seperate on impact. There is something loose inside. It still functions perfectly however.