Hello.
I was doing a random ICC run today, where i realized at the Gunship Battle that this group was not going to succeed.
I left the raidgroup and waited the 60 seconds for a TP outside while the battle was going on.
When i was ported out, i used my HS, and still had my Goblin Rocket Pack in Orgrimmar! I tried to log out and back in, and it was still present.
Enjoy
Screenshot proof:
http://imageshack.us/a/img255/6632/s...120916kl10.png