The vessel or Patra prescribed for Agnihotra is made of pure copper which is known for its Oligodynamic (i.e. antibacterial) properties. Copper, which is known to be an excellent conductor of heat and electricity, plays an important role in the process of Agnihotra. Agnihotra has close connection with fire, heat, electromagnetic forces and cosmic energy fields. The shape of Agnihotra vessel is precisely similar to pyramid.