Common materials include rice flour, barley flour (Jau), black sesame seeds (Kala Til), Kusha grass (Darbha), honey, ghee, milk, flowers, fruits, betel leaves/nuts, Gangajal, uncooked rice, and items for Brahmin Daan (like grains, cloth). Yes, all these materials are easily available for purchase in shops near the Ghats and temples in Haridwar. Many Pandits or service packages include the cost of Samagri.