This is a box of Backflow Dhoop Cones. Backflow dhoop cones are specially designed incense cones that produce a unique visual effect when burned. Unlike regular incense cones that release smoke upwards, backflow cones create a mesmerizing, waterfall-like stream of smoke that flows downwards. This effect is achieved through a combination of the cone's design and the use of a backflow incense burner, which has a specific design to encourage the smoke to cascade downwards.