What year did Welch's g juice stop using gl jugs?

I found an old jug in the woods by my house. It's a liter (maybe) and has clusters of gs imprinted in the gl with "Welch's" spelled in between the cluster. Yeah, so if you could tell me what year they stopped making them or if they still make them that would be great. I's like to know if I found an antique while walking thru the woods. =)