The increasing numbers of waste plastic bottles over the years has create environment issue all over the world. by using the waste plastic bottles it is not only about the awareness regarding environment issue, but enhancing the safety purpose of the boat. obviously, a fiberglass boat has the tendency to crack during the hit by the heavy wave or accidents. hence, the wasted plastic bottles filled inside the rescue boat could act as a floating object to support the rescue boat for a while and avoid the boat to sink directly.