Last Updated: Sep 28, 2016 Views: 282
We have a trade catalog from Wheaton/Nuline, which made milk bottle reproductions in the late 60s and 70s and are as you describe---available in blue, green, topaz, orange and "flint." They came in 3 sizes 1/2 pint, pint, and quart, were made in Italy, had porcelain sealing caps and were embossed as you describe.
You may want to contact Wheaton Village to find out more about the bottles (http://www.wheatonarts.org/museumamericanglass/frequentquestions/wheatonbottles).
Let me know if you have further questions!