The keg law went State wide last Aug. The State also outlawed polyproplyne coolers, too.
LOL a fix to change the law to styrofoam is in the works.
http://www.moga.mo.gov/statutes/C300-399/3060000109.HTM
Alcoholic drinking devices, containers, and coolers prohibited on rivers--violation, penalty.
306.109. 1. No person shall possess or use beer bongs or other drinking devices used to consume similar amounts of alcohol on the rivers of this state. As used in this section, the term "beer bong" includes any device that is intended and designed for the rapid consumption or intake of an alcoholic beverage, including but not limited to funnels, tubes, hoses, and modified containers with additional vents.
2. No person shall possess or use any large volume alcohol containers that hold more than four gallons of an alcoholic beverage on the rivers of this state.
3. No person shall possess expanded polypropylene coolers on or within fifty feet of any river of this state, except in developed campgrounds, picnic areas, landings, roads and parking lots located within fifty feet of such rivers. This subsection shall not apply to high density bait containers used solely for such purpose.
4. Any person who violates the provisions of this section is guilty of a class A misdemeanor.
5. The provisions of this section shall not apply to persons on the Mississippi River, Missouri River, or Osage River.