The North Eastern Tea Association (NETA), an organisation of tea planters in Upper Assam, has asked the Government of India to declare tea as a national drink.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/declare-tea-national-drink-assam-planters-urge-centre
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/assam
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tea
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agro-based-industry
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects