P. W. Ackermann is a stationery store founded in 1910 in The Hague, Netherlands. Its extensive selection and deep knowledge have made it famous not only in the Netherlands but also internationally, and in 2010 it became a purveyor to the Royal Family. In 2010, to commemorate its 100th anniversary, the company released an original ink in 150ml bottles, which sold out quickly due to its unique shape. However, in response to popular demand, the same 31 colors will continue to be sold in smaller 60ml bottles. Many of the ink bottles, named after The Hague, Netherlands, feature a glass marble inside, similar to a soda bottle, allowing ink to accumulate at the top. This practical design eliminates the need to submerge the pen nib to the bottom of the bottle and makes it easy to use even with low ink levels. Please note that the outer box has changed color. Old: Yellow x Yellow → New: Mint Green x Red (design and size remain unchanged). Due to this running change, the outer box may differ from the image shown.