Students at St Monica School, Birkirkara, have swapped disposable water bottles with 1,000 plastic flasks as part of the HSBC water conservation programme Catch the Drop campaign.
A water conservation sticker urge users to close taps and save wate was also supported by the programme.
Future plans for the school include water-saving press taps.
The HSBC programme is the largest national environmental and educational campaign and aims to forge a blueprint for progress on sustainability of water as a resource.
The campaign is inviting students, schools, and local councils to submit proposals for water harvesting projects to be supported during the current scholastic year.