Mumbai's tap water is not really safe for visitors to drink. so you need to boil ,buy or purify many varieties and several different sizes.
Soft Drinks  : Plenty of local and international brands of soft drinks are available, through local brands (such as limca & thumsup).

Fruit Juices & Other Drinks :  Delicious fruit juices are sold at cafes and juices stalls.  They come in exotic varieties such as mango, custured apple and lychee.

Alcoholic Drinks :  Foreign beer have entered the local market backed by well-oiled publicity machines.  Foster's is the first international brewer to invest in local operations, they have opened a plant in the Maharastrian town of Aurangabad.