How much green gas emits if we use LPG to increase temperature of 100 ml of water by one degree celcious ?

We are the largest producers of Thermos Flask in India.
We would like to promote usage of flask to avoid reheating
and there by saving energy. Tea/coffee are heavily consumed beverage. Also flask for cooking rice, cereals, porridges etc. LPG is major cooking fuel in India.

We would like to educate consumers green gas emission by reheating using LPG.

C.P Unnikrishnan
cpuk123@gmail.com