The vase in the De Witte Zwaan collection is shaped like an oversized parrot tulip. The glass vase is made of opaque glass ranging from purple to black. The tulip petals are slightly curled open, with the inside of the flower forming the cavity of the vase. The petals overlap and have details along the edges of the glass, beautifully showcasing the folds and ridges of the petals. The vase's glass is the same color as a real black tulip: deep purple.