Answer:
Drop me and the world will shatter. You can always find me where you empty your bladder.
I make everyone blind. You can't see me but I will always come back for you. What am I?
I have a name that's not mine and no one cares about me in their prime. People cry at my sight and lie by me all day and night.
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
Fashions change, but what can a person wear that is never out of style?
What is yours but only used by others?