Old Handblown Square Bottle

I just purchased this nice old square bottle in a secondhand shop. The reason it caught my attention was the way it had greened and the size 9" tall and 4.1/2" in diameter. It's been hand painted with flowers and probably used as a flower display bottle. It is an applied finish and the seam goes right to the top of the neck and ends at the shoulder it's been rolled over down from the shoulder half way down the bottle, the other seam goes all the way down to the base but disappears under the base. There are lots of bubbles in the glass and the sides are very wavy. Would like to know the age and what it was used for and the maker if possible.