Automatic Milk Booths, as they are commonly called, the Automatic Vending Machines of Milk by Aavin (the Milk Cooperative Society in Tamil Nadu, by the Government). The common modes of buying milk here are either through Milk Cards for a month, used by regular buyers or through retail sales. (One coin for every Half a litre was their standard practice, used to be a coin equivalent of 25 paise coin size then).

One such AVM at the Royapettah Clock Tower.