This Test Chamber Sticker Sheet is awesome, if you’re a massive fan of Portal 2.
Each sheet has 9 individual black and white stickers and are printed on vinyl with water and UV protective laminate. They are Official licensed Portal 2 collectible, so you’re getting the real deal. You could stick them on the back of your car or on your wall. They come in some classic Portal 2 designs and measure 11″x 11″. Not too costly and available from Think Geek for $12.99.
Via Think Geek