Kiehl's Powerful-Strength Line-Reducing Concentrate Vitamin C + hyaluronic I am a skin care junkie and having using this for the last four months. It has an 18 month expiration so that means it’s still valid for 14 more months. It’s about halfway full. The original size was 3.4 ounces but I’m estimating that half full. Please feel free to ask any questions. Questions? Leave a comment below!