He ate bread and fish with His disciples after He rose from the dead. Eating and drinking was a trademark of Jesus' ministry, and always with the eating and drinking came teaching. The early church continued the pattern of eating and drinking, as well as the teaching. Daily the early Christians broke bread in their house churches. Weekly they came together for the the Word and the Lord's supper.
Eternal life is pictured as a big wedding feast, with the finest of foods and wines.
There is more than to eating and drinking here than just refueling the body. There is fellowship, table fellowship. Think of all the times we eat and drink for more than just to get some food in us. Even at funerals. At major holidays - the 4th of July, Memorial Day, Christmas, and of course that grand daddy of all eating and drinking days, Thanksgiving.