I’m told this is a Famitsu exclusive that’s tough to find at this price. It was originally only available on their website and now been discontinued. Includes the PSP game software, a water bottle (“Peace Water”), a 1000 piece puzzle (“Love & Piece”) and art work of the completed puzzle.
You can also check out the entry for the item on DieSnake, the Metal gear Collector Forum.
Edit: Looks like it sold already.
Seller also has another copy bundled with the PSP Metal Gear Solid Peace Walker Premium Package and a PSP Metal Gear Solid Peace Walker Konami Style
(which was limited to 1974 sets).