- in hostels, on each floor, camphor is kept which is the only source of drinking water <span style="background-color: #f5f6f5;”>and the students can not see how much water it has. It has limited water storage, which gets finished early and the person responsible for filling doesn’t know about it until that person comes upstairs and open and look at it.
- a detector for water level which indicates about it and also shows how much water is left after every change, informing the people using that camphor.