Hi
Wheaton Glassworks produced "reproduction" bottles during the later 1960s and 1970s. They are fairly plentiful.
They are not exactly reproductions in that the bottles are similar in spirit but not identical to original examples; the glass colors, embossing and sizes are not the same as the 19th century bottles on which they are based.
I have been collecting for over 35 years and have watched prices of some reproduction glass grow quite a bit. Look at the market values of some of the EG Booz bottles for example.
It is hard to say where value will go long-term for 20th century bottles. I am not sure it will increase in value like the best 19th century (and earlier) glass has, but I it is likely there will always be some interest.