Each Ayyappa devotee carries numerous holy items in his Irumudi Kettu as offerings to the Sabarimala   Ayyappa  Temple Sabarimala   Ayyappa  Temple 
Coconut – minimum two
The first coconut is broken at the Pampa  Ganapati   Temple 
 
 
Some devotees also break a coconut after completing the darshan at the base of Pathinettam Padi.
Those devotees undertaking thenga uruttal or the rolling of coconut at Malikappuram   Temple 
Neyythenga or coconut filled with ghee
The ghee in the coconut is offered for Neyyabhishekam. If there is a group then you can collect the ghee from all the coconut in a vessel and offer it at the temple. Otherwise you can pour the ghee in a vessel provided inside the main temple complex.
The pieces of Neyythenga should be thrown into the huge fire bowl or Aazhi in front of the temple after completing the darshan. 
Turmeric Powder or Manjal offering
This is offered to Nagaraja (the serpent gods) and mountain deities residing near the Malikappuram   Temple 
Aval, Malar, Banana and Rice Powder
This can be offered at the Kochu Kadutha Shrine near Malikappuram  Temple 
Bhasmam
Bhasma can be sprinkled at the Mani Mandapam near Malikappuram  Temple 
Karpooram, Agarbathi etc
Such items can be offered in the main temple and all small temples.
Uncooked Rice or Unakalari
This is can be offered for Annadanam or at the free food counters. There is also an opportunity to give the rice and buy Jaggery or Sharkara Payasam. 
Betel Leaf and Betel Nut
This can be offered at the Shrine of Kochu Kadutha at the Malikappuram  Temple 
The Sharakol or Arrow from Erumeli
The Sharakol should be kept at Sharam Kutti.