I recently came across a completely sealed glass bottle of a and w rootbeer 16 fl Oz. Its half full and from what i have found it is due to natural evaporation there is no cracks chips or dents. The cap is also distinguishing as it has a warning label of product being hazardous to health bevause it contains saccharin which has been determined to cause cancer in laboratory animals. Its dated 78 the letter f and batch code of an i in an oval followed by the number 145. Can anyone help me to appraise this bottle im not finding any bottles online that is a match for mine and is still half full after 50 years