Puffed rice is a type of puffed grain made from rice, commonly used in breakfast cereal or snack foods.
It is served as a popular street food in India where it is usually made by heating rice kernels under high pressure in the presence of steam.
However, the method of manufacture varies widely.
It is widely used in countries like India where a traditional puffed rice called muri is made by heating rice in a sand-filled oven.
Muri is to rice as popcorn is to corn and they processing involved makes rice less perishable. (source)
So can hamsters eat puffed rice?
Puffed rice is not the best for them to chew on as it has no nutritional value for them.
As a result, they can eat a few grains but not too many.