Nowadays life rafts are often replaced by slide rafts, the slides having a double function: Evacuation and when detached survival. However they are packed tightly in the aircraft doors, so they probably don't contain a survival kit.
Nice illustration by Ron Wilson
Though it would be typical of ditching on Lake Michigan, not in heavy sea
For routes over oceans, what is the equipment that is available aboard rafts when they are used? (first-aid items, food, water, radio, etc). Where is this equipment stored before evacuation? Who takes care of making this equipment available in each raft?