River pollution is a serious Environmental Sciences issue. Pollution in the form of rubbish flows from our houses into the main drain. The rubbish will either clog at the main drain trap or worst goes straight into the river. Drain Trap Cage (DTC) will prevent rubbish from entering the main drain. DTC is a cheap, simple and reusable product and it has to be emptied periodically. DTC materials are highly resistant under extreme conditions. DTC is available in 2 types of sizes according to standard drainage systems and ready to be commercialized.