Sales of full-calorie carbonated soft drinks have sharply decreased in US schools, according to a recent study. Using data from 14 bottlers and schools in 10 states, the study for the American Beverage Association (ABA) found sales during school hours averaged about one 12-oz can per high school student per week last year.

While full-calorie purchases dropped by 24%, water sales increased by 23%, diet soft drinks by 22%, pure juices by 15%, and sports drinks by 70%.

This confirms what previous studies have shown and ABA insists - consuming full-calorie soft drinks purchased from school vending machines is not a major contributor of calories to youth diets or to obesity rates.

The ABA recently unveiled a school policy that defines beverage choices for students based on parental feedback.