Newbie needs ID help on this one. 8" tall 3" wide aqua green bottle with all 4 sides slightly indented. Not a mold seam mark anywhere on bottle including base, sides, and neck. Slight twist in neck. Bubbles from base to finish. Suction mark/Pontil on base feels lumpy but smooth. Flared finish is 1 1/4" wide and throat is 3/4" inside diameter. Looking for approximate age and also what was this used for?