Participants
Eligible participants were males and females in Mexico between 18 to 30 years old, studying at public and private schools of upper-middle and higher level, who had access to a smart mobile device or a computer with an internet connection. We excluded participants who reported not having consumed beer in the last 12 months. We considered this exclusion criterion since we used images of a beer can, the most consumed alcoholic beverage in Mexico [Based on the 2011 National Addictions Survey, we stratified the sample by region (north-central, northwestern, northeastern, west, central, Mexico City, central-south, and south) to represent the variability in alcohol consumption across the country [Officials from the Pan American Health Organization in Mexico contacted local authorities (officials from the local Ministries of Health and Education and officials from public and private schools) from 11 states (Supplementary Table Ethics approval for this study was obtained from the 