Unlike standard notebooks where variety is limited to cover styles, the Triangle Notebook ditches the banal shape of a rectangle for the (you guessed it) triangle. The mod journal, designed by Turkish artist, Tan Mavitan, is a MoMA exclusive from the Destination: Istanbul collection. A reflection of Istanbul's highly geometric design aesthetic, the Triangle Notebook converts from its unusual shape into a square when opened. A durable fabric cover is sturdy yet flexible enough for optimized writing on the 144 ruled pages inside.
Snag this limited-edition notebook at MoMA's online store for $18.