What the Bible says about Jesus Christ's Generosity
(From Forerunner Commentary)
Normally, the water pots supplied water for the ceremonial washings in accordance with Jewish tradition (Mark 7:3-4). Each water pot could hold two to three firkins of water, equivalent to 17 to 25 gallons. This means that the six water pots could hold a total of about 150 gallons of water! When Christ blesses, He does it abundantly! On other occasions, Jesus miraculously provided more than enough food (Mark 8:8; John 6:13). His generous abundance in giving coincides with the wealth of His lovingkindness.
Martin G. Collins
The Miracles of Jesus Christ: Water Into Wine (Part Two)