From Team Fortress Wiki
The Upgrade to Premium Gift is a tool that appears as a fictionalized, worn-out retail box copy of Team Fortress 2 featuring the Soldier and a peeling barcode sticker. When used, it will grant the user a premium account granting them perks such as a 300 slot backpack, access to all crafting recipes, and the ability to trade their items to other players. Gifting this item to another player will give the sender the Professor Speks item.
November 21, 2012 Patch
- Added Upgrade to Premium Gift to the game.
March 19, 2013 Patch
- Updated the backpack image for the Upgrade to Premium Gift.
- While the barcode was developed in the 1960s, the decade in which Team Fortress 2 takes place, universal barcodes such as the one seen on the Upgrade to Premium Gift were not commonplace until the 1970s.
- Originally, the Upgrade to Premium Gift used a similar backpack icon as the Backpack Expander, but was tied with a red ribbon instead of leather straps and lacked the Heavy Duty Rag, Description Tag, and Mann Co. Supply Crate Keys.
- The image of the Soldier on the front of the box is the Soldier Portrait Poster.