Mumbai, Dec 26 (ANI): World renowned 'dabbawalas' (lunch box carriers) of Mumbai on Friday wielded brooms to sweep streets after Prime Minister Narendra Modi nominated them to join 'Swachh Bharat Abhiyan'. The 'dabbawalas' are city's lifeline as the team of around 5000 people supply food to around 200,000 office goers every day. They carry hot food in lunch boxes from the houses of Mumbai residents in the morning and deliver them at their workplace. A group of lunch box carriers assembled at Lower Parel area and swept the streets and footpaths with a promise to involve their customers also in this campaign. The dabbawalas, world-famous for their efficiency, co-ordination and hygiene, said they would do their best to ensure cleanliness around.