Proposals are invited from ngos, social groups, advertisement agencies as well as corporates with social responsibilities for immediate implementation of automated public toilets in indian metro cities. Nevil consultancy services pvt. Ltd. Has developed a unique concept and product nevil apt: automated pay and use public toilets. Which is 100% eco & environment friendly made out of recyclable tetrapak waste. Which can be constructed very easily within a span of 24 hours. Which is solar energy non conventional energy compliant. Revenue generation can be done against display of hoarding and other related publicity material. Drdo biodigester technology where sewage facility is not available like beaches, reserved areas or crz areas. The biodigester technology has been adapted from ministry of defense (drdo) and it is successfully tested on indian railways.