Old mountain dew bottle?

i have an old mountain dew bottle that i cant find any information on and was wondering if anyone could help me. it is a green glass bottle that is textured all around it. it has a picture of a hillbilly on the front and says it is 10 fluid oz. and also says no deposit and Mountain Dew. on the back is says Mountain Dew, it'll tickle your innards. has no paint on it and i dont think it ever did. on the bottom it has the number 21. it is almost 8 inches high. tell me if you know anything about it thanks