Avoid my grammar mistakes and such, English is not my first language.. so allow me please
Okay, this is probably old. But I sense a lot of people still don't know about it. So here I am, hopefully there is atleast one person who didn't know this.. so that I dont feel stupid :P
So if you guys have any alts/trials. Log them in now (assuming you havent logged in and claimed the gift from WoW development team).
Claim the prize, open it and use the token. After you're done using it, you will get the buff for an hour. Gift wrap the item and send it to one of your other Alts/main.
As long as the item stays gift wrapped and inside a mailbox, it will not disappear (not bank, no guild bank). You can use it anytime and gift wrap and send it back to a mailbox.
You can also trade the items while its gift wrapped. Pretty good for people who love grinding rep.
EDIT: Just realised, the mail from wow from all my alts is automatically deleted, however its still there on my "trial toons".