These boxes drop [Companion: Hyrkanian Pit Boss], which is a BoP companion, and it says "Can Only Have One". This is really annoying since it means you can get duplicates that are worthless. You shouldn't be able to have duplicates of "Can Only Have One" items but due to a long standing bug, we have this issue. Since they are BoP, you can't trade them to alts.
Something really needs done to stop issues such as this, especially when you are dealing with items purchased through the Item Shop for real money.
At the very least, this companion should have the BoP flag removed so we aren't getting screwed out of money when we get our 2nd and 3rd duplicate useless pets in the same box.