This endline survey report presents findings (‘after’/post intervention) of the ColaLife Operational Trial Zambia (COTZ). Data collection was undertaken in August 2013, a year after the baseline data collection in August 2012 (which presented ‘before’ intervention measurements). Data collection took place in Kalomo (treatment district) and Monze (comparator district); both are in Southern Province. In Eastern Province, data collection was carried out in Katete (treatment) and Petauke (comparator). COTZ focuses on the community-level distribution of a new anti-diarrhoea kit (ADK) called Kit Yamoyo via Coca-Cola wholesalers in the district towns, and trained, existing rural micro-retailers, supported by community-based marketing of the new product. Kit Yamoyo contains the WHO/UNICEF recommended combination therapy of low osmolarity oral rehydration salts (ORS) sachets, zinc sulphate (10-day treatment) and a small bar of soap for hand washing.