Although it is mostly serve warm, some people likes them served cold.
Badam is the Hindi word for Almond.
Pictures below is a warm Badam Milk sold as street food in the heart or center of Coimbatore in Tamil Nadu at night time.
Please see Article on Badam Milk being sold in the night as street food in Kanyakumari, Tamil Nadu, another southern state of India
List of books: Badam,Milk