Crisp Rice is a type of puffed grain made from rice, commonly used in breakfast cereal or snack foods, and served as a popular street food in India.
Puffed rice is an ingredient of bhel puri, a popular Indian chaat (snack). It is offered to Hindu gods and goddesses in all poojas in the South Indian states of Kerala and Tamil Nadu. Pilgrims of Sabarimala often pack puffed rice in their Irumudikettu along with jaggery meant to be offered to Lord Ayyappan. Tamil saints say that Lord Ganesh loves pori, so it should be offered to him without fail. Pori has been mentioned in various Tamil literatures as an offering to Hindu deities. Offerings of pori and jaggery made to Vinayagar (Lord Ganesh) are mentioned in the Tiruppugazh, a 15th-century anthology of Tamil religious songs, written by Tamil poet Arunagirinathar.
It is considered to be generally safe.
None are recorded.
Source: Wikipedia, https://en.wikipedia.org/wiki/Puffed_rice#Usage