Made this vase from a waste glass bottle using crackling medium.
Paint a thick layer of blue acrylic paint on the bottle. Let it dry. Apply another coat.
Apply a thick coat of crackle medium with another dry brush and let it dry for 20 to 25 min.
Apply a relatively thin layer of another contrasting acrylic paint and again let it dry for an hour. while the second colour layer dries, cracks start to appear showing the first colour layer.