Amazons big, orange, mysterious locker that appeared in downtown San Francisco yesterday will not be a permanent fixture in the city, and is instead part of a marketing blitz for a Nissan automobile. The box, dubbed Giant by Amazon, is the largest Amazon locker of its kind, and showed up yesterday without explanation. Overnight, Amazon added a large Nissan logo to the front of the locker, as well as a #giantlocker hashtag, as part of a give away for one of Nissans vehicles, Amazon tells The Verge. Amazon is also giving out free music downloads, and $5 gift cards to those who use the hashtag in a tweet or on a Facebook post.