Ekomuro H2O+ is a vertical rainwater storage system made of recycled PET bottles that harvests rainwater for reuse. It has been implemented in over 50 schools in Colombia to provide water and promote environmental education. The system consists of assembled modules of PET bottles that are installed on rooftops to collect and store rainwater. Ekomuro H2O+ aims to promote appropriate technology and a circular economy through rainwater harvesting and reuse of plastic bottles.