Don't drink anything that isn't in a sealed container from a manufacturer... and be careful what you eat, too.
This incident follows recent scandal in the eastern city of Kolkata, famed for its Bengal delicacies, police this week unearthed a racket in which 20 tonnes of rotten meat from dumps was being sold to restaurants.
Police suspect a lot more had been sent out to city restaurants.
Still want to travel the world? Bring some dehydrated K rations. Or, wind up finding out what the local hospital care is like.
https://www.theguardian.com/world/2018/may/03/indian-tea-seller-caught-using-water-from-train-toilet