Very often, you'll have me
When you have me, you get multiple of me
After getting me, you must make me
And then all but one of me will disappear
Who or what am I?
Hint #1:
The first me and the many of me that you get share the same name, but we aren't quite the same.
Hint #2:
The one of me to stay will be one of the multiple you get, as referred to in line 2.