DELAVAN, Wis.-In school vending machines around the country, milk is beginning to replace soft drinks, and nowhere is the trend more pronounced than in Wisconsin, according to the Wisconsin Milk Marketing Board. Two-thirds of the high schools in the state known as America's Dairyland have milk vending machines, the organization says. That's a higher percentage than anywhere else in the country, says Laura Wilford, director of the WMMB's state Dairy Council. The state has 365 milk vending machines in high schools; but elementary schools generally don't have vending machines.