What kinds of milk are low in carbs? I have heard about coconut milk but I'm not sure what's best.  PS: I am from India, maybe someone might want this info:-) 
Non-sweetened almond milk is probably what most people on low carb diets drink, when they drink it. It has < 1g of carb per cup.  Personally, I completely stopped drinking milk because of carbs years ago and I don't look back. I only drink a little bit of half and half with coffee, and even though it still has carbs, it's so little that it makes little difference. 