This claim has been debunked by several fact-checking organisations. The Indian Army did not perform the bottle cap challenge.
The video goes viral on social media as a canon of a tank moves to remove the cap from a bottle performed by the Indian army on 20 July 2019. However, according to the Quint fact-check enquiry, there is no evidence of Indian army performing the military tank bottle cap challenge.
It has also been fack checked by the Indian Express.