A geography project which aimed to reduce their school's plastic bottle waste held water for Bailey Raymond and Jack Maddeford.
The year 9 students at St Agnes Catholic High School, Rooty Hill, had a water refill station installed in a covered area of their grounds after they researched water access and the devices used by Manly Council.
Bailey, 15, said the station was connected to the same plumbing as the school's bubblers and has dispensed cold, filtered water since April.
The challenge-based learning task that spawned the project was completed last August.
"It's the only project we've done that gets you to move outside of school and into the community," Bailey said.
"It was challenging definitely. Afterwards we entered a competition for environmental projects and were in the top 20, so we won $1000 for the school which was pretty cool."
The pair plan to use the money from Interface — a company that makes carpet from recycled fishing line and other materials — to purchase metal water bottles for year 7 students in 2015.
This will expand to include the rest of the school's 750 students if their budget allows.
Bailey said the number of students who use the station had grown.