Indian Railways — No drinking water facility in train

I m traveling with my other three friends from Nagpur to Mumbai by 12290 duronto express coach S5 seat no 26, 27, 29, 30. We need drinking water but here is no water facility in train as well in pantry. Pls do the needful. Here are so many child in coach who are also crying for water n we all waiting for next station to stop train. So that we can buy it from outside. Very poor rail service.