Material:
It is typically made with a double-walled stainless steel construction, often with an insulating layer in between to prevent heat loss and keep the outer surface cool to the touch. 
Purpose:
Ideal for serving and storing various hot dishes like biryani, rice, curries, or rotis, and can also be used for cold items. 
Features:
Often includes a tight-locking mechanism to maintain temperature and a comfortable handle for easy lifting and opening. 
Capacity:
Available in various capacities, commonly ranging from 1 liter to 10 liters or more.