The vase with the model number “1907” is Hedwig Bollhagen’s final design and stands out for its clean, functional form. Its defining feature is the bottle-like, rectangular, cylindrical body, which earned it the nickname “Inkwell.” The round, cylindrical neck with its slightly flared rim makes it a design object that stands out even without flowers. At 64 centimeters tall, the 1907 floor vase is the largest and heaviest in Hedwig Bollhagen’s collection.