We purchased the larger lunchboxes and found that they they are only tied to one vault. I understand that the smaller purchases would be for one, but why the larger quanty ones? I really wish that was made clear as its frustrating and will limit the replayablity (or better said- future purchases). For an update, it would be nice if you pay the higher price, you could be able to allocate lunchboxes over mulitple vaults.