St. Louis' giant Anheuser-Busch brewery will make a flavored, caffeinated beer to fight competitors who are attracting young adult drinkers.

Known as Be, the 6.6% alcohol beer will contain 54mg of caffeine, similar to what a 12-oz. can of Mountain Dew contains, ginseng and guarana, a paste derived from a Brazilian fruit, the St. Louis Post-Dispatch reported.

It also will have fruit flavorings like blackberry, raspberry and cherry.

To be brewed in Houston, the beer will come in a 10-oz. can that is slimmer than traditional beer cans.

Recently 21- to 27-year-olds, a coveted demographic group, have become increasingly interested in spirits due to the wide variety of flavors and colors available in mixed drinks. Many try these drinks in bars and clubs.

"We've created Be for the 21- to 27-year-old contemporary adult consumer, specifically in mind for those who are looking for that latest drink to keep up with their fast-paced lifestyle," said a company spokesman.