As an object makes the transition between a flat surface (plate or platter) and a sphere, the object passes through a series of shapes that have progressively smaller openings. These shapes can be described as, closed form bowls, vases, bottles and hollow forms. Please click on an image to take you to a page showing more examples of each type of vessel that has these shapes.

buckeyeburlvase

Vases

spalted tamarind

Closed form bowls

balloon

Bottles

curly mangoHF

Hollow forms