Nail polish bottle change

[elle25]

I'm trying to get np's from past collections and I was just wondering what year, or with which collection, MAC changed the bottles.
I tried looking for an answer but I wasn't really sure what to search for.

 

[Makeup Emporium]

Well I have 3 of the old square bottles that are tapered at the top (Frostie Pop, Kloreen & Psychodahlia) and they are all from 2000 so anything from that far back would be in those bottles. Then I have Undercurrent from 2003 and that is in the square bottles (without the tapered top). Then a bunch from 2004 that are all in the rounded bottles. Hope that helps to narrow things down a little bit more.