Antique Iranian three-sided blue ceramic bottle

This is a triangular Iranian vase (Qazar Iznik pottery?) in blue. It is decorated with a floral motif and a bird. The motif is similar on two sides but differs in details in the design. The motif is reversed on the third side. The edges of the bottom are very slightly chipped. I do not know its provenance and its age because it was given to me as a gift 40 years ago.