1. Post-Prohibition liquor bottle, looks like 1941 most likely.
2. Some sort of sauce probably. Or something along those lines. Probably mid-20th century.
3. I have no idea, the photo is too blurry to see anything. Looks like maybe some sort of early 20th century food bottle which was irradiated to turn it dark purple?
4. Mid-20th century milk, probably has a date code but I can't see it in the picture. Looks like it was a long-running dairy in New Philadelphia, Ohio. Goshen Dairy lasted 81 years until it was bought out in 2002: https://www.the-daily-record.com/story/news/2002/01/30/smith-dairy-acquires-goshen/19489507007/