Just though I'd let you all know about a little competition mountain dew are running here is the UK (dunno if they have it stateside). Basically, buy a promotional bottle (has master chief on the label) and enter the code onto this website
https://www.mountaindewenergy.co.uk/It grants you 1 entry into the prize draw to win a trip for 2 to seattle to 343 studios for a behind the scenes tour and you also stand a chance of winning a copy of the game or 360 avatars. If you share the link on either facebook or twitter you get a bonus entry per code shared.
Most supermarkets are stocking it although i'm yet to look around sainsburys and ASDA.
Thought that might appeal to the video gamers of our community.