The Bible mentions that there are three types of wines.
#1. Fermented Wine (Strong in alcoholic content).
#2. Fermented Wine Diluted by Water (Low in alcoholic content)
#3. Unfermented Wine or Freshly Squeezed Grape Juice (A non intoxicating beverage).
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 (Wine Type #2):
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." (cf. Psalms 75:8).
1 Timothy 5:23 (NASB) says,
"No longer drink water exclusively, but use a little wine for the sake of your stomach and your frequent ailments."
Proverbs 9:2 (NLT) says,
"She has prepared a great banquet, mixed the wines, and set the 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 NIV says,
“Your silver has become dross, your choice wine is diluted with water.”
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 use it.
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 (for the times).
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:
Dictionary.com, older dictionaries, a Welch’s grape juice ad, and old historical documents refer to grape as wine, too. Even the Bible does, too. For what exists inside the cluster of the grape according to the Bible? New wine. Alcohol is not present inside the cluster of grapes unless they are crushed and they ferment.
Not true. There were ancient ways to preserve and make fresh grape juice according to historical documents. They boiled it or they made it into a paste and stored it in jars in cool temperatures, such as placing it under water. Welch’s was the first person to perfect the idea and popularize it or to turn it into a profitable enterprise.