Grape juice did not exist as a commercial product in the ancient world due to the presence of wild yeasts on the grapes themselves, which would quickly break down the grape juice within a few days. Grape juice would not be invented until the late 19th century, using pasteurization.
Well, before I provide you a source link to the history of grape juice preservation, you first need to know that there are...
Three Types of Wine in the Bible:
Among the saints and various cultures, wine in Biblical times was mixed with water. This would be one of the three types of wine mentioned in the Bible. Here is a quick list of the three types of wine in the Bible:
#1. Fermented Wine (Strong in alcoholic content).
It was primarily barbarians or pagan Gentle nations who drank this kind of wine. In fact, this thing still goes on today in Gentile nations.
#2. Fermented Wine Diluted by Water (Low in alcoholic content).
This was the type of wine the Israelite drank and it was the wine that was served by the wedding organizer at Cana. Israelites would store fully fermented wine in leather pouches and or by other methods and then they would dilute it with water in order to drink it.
#3. Unfermented Wine or Freshly Squeezed Grape Juice (A non intoxicating beverage).
This was the wine that Jesus made at the wedding at Cana. It is also the wine used in the Passover.
I believe the wine during Bible times that the Old Testament saints drank was Wine Type #2, whereby it was a wine mixed with water and was lower in alcoholic content (Which was the wine seen at the Wedding of Cana before Christ made Wine Type #3, which was non intoxicating grape juice or unfermented wine); In other words, the wines commonly drank by the OT saints was not like the strong wines of today; And Jesus made grape juice that made was considered the “best wine.” Wines of today (By wine tasters) are considered the best by their taste and not how much they can intoxicate you.
Wine mixed (diluted) with Water Verses:
Revelation 14:10 says,
“The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb” (Contrast this with Psalms 75:8)
1 Timothy 5:23 says,
"Drink no longer water, but use a little wine for thy stomach's sake and thine often infirmities."
Proverbs 9:2 (NIV) says,
"She has prepared her meat and mixed her wine; she has also set her table."
Proverbs 23:31 - Do not look at wine when it is red.
John 19:34 - Blood and water mingled together from Christ's side; And Scripture essentially says the wine in the Lord's supper is representative of Jesus's blood (See Matthew 26:27-29).
Isaiah 1:22 CJB
“Your silver is no longer pure, your wine is watered down.”
Pure silver, which would be too soft to be durable, is mixed with 5-20% copper in an alloy known as sterling silver.
How silver is made - material, making, history, used, processing, industry
If one were to take note: One has to mix copper in silver in order for it to be durable so as to be used. Just as one must use water in their mixture of wine to drink it more safely like an Israelite.
So the idea here is that the silver (mixed with copper) they use has become so dross (or watered down it is then cheap. Just as the wine (mixed with water) is diluted even more whereby it is cheap wine to the Israelite.
Wine could be carried in an undiluted state within leather skin like bottles and then later mixed with water for use. Timothy was told to use a little wine in his water because of the infirmities in his stomach. Paul was telling him to use Biblical wine so as to resolve a medical issue.
Extra Biblical Sources on how wine was mixed with water:
2 Maccabees 15:39, Talmud, and Justin Martyr, etc.