 Other products available through the Valve store include T-shirts and Aperture Science coffee mugs and parking stickers, and merchandise relating to the phrase "the cake is a lie", which has become an internet meme.Wolpaw noted they did not expect certain elements of the game to be as popular as they were, while other elements they had expected to become fads were ignored, such as a giant hoop that rolls on-screen during the final scene of the game that the team had named Hoopy.A modding community has developed around "Portal", with users creating their own test chambers and other in-game modifications.