With each morning and evening sin offering, a drink offering was poured out to God. (Exodus 29; Numbers 28). The only mention of the drink offering which did not accompany a sin offering is found in the account of Jacob's reconciliation with Esau in Genesis 35:14.
It would seem that the drink offering represents the joy as a complement to reconciliation. Paul poured out his life as a joyful complement to the reconciliation he found in Christ. As the old coffee commercial said, "Maxwell House coffee is good to the last drop." Paul's life, as an example to us, was good to the last drop also. There was no retirement mentality in Paul. His life, until the day Christ called him home, would be an offering of joy and thanksgiving for the reconciliation he found in Christ.