Red, yellow, green, and blue bottles filled with cement, mud, and sand adorn the 100-metre wall of a college in Narayanpet. They are stacked together using cement. Once you enter this compound, you'll feel light and rejuvenated by the colourful ambience. Using 40,000 plastic bottles and 2,000 glass bottles, the Narayanpet local administration has remodelled a compound wall for the Narayanpet Government Degree College. These plastic and glass bottles are filled with mud, cement, and sand and their bottom or top portions were painted in different colours. They were then retrofitted into the wall using cement. Interestingly, not a single brick has been used to create this wall