(Video: rinjani1976)
It is a custom and part of a tradition in Bali when someone dies, the whole villager (where one was lives) will help with the preparation for the cremation. The dead body is laid out in a special part of the house to be bathed and prepared. The night before the cremation, holy water will be collected from some main temple and used in preparation of the body and during the cremation. The entire villager (but especially for family and relatives) will participate on the day of the cremation ceremony. Before the body cremated at the cemetary, it will be placed into a wadah, after at the cemetary, and then they body of the deceased is placed inside a coffin which is then placed inside a form of a lembu (cow) which believes to be the vehicle of the spirits, made of paper and light wood. It will be carried to the village cremation site (usually in the village cemetery) in a procession. The ultimate procession is to burn the Wadah, using fire from a holy source.
When all the procession has done the ashes are placed in the sea, and it is the final separation of the soul from the body.
(source: www.dee-bali.com)