Soft drinks and alcohol can be purchased from shops at Eurong and Happy Valley, although alcohol is not available before 10AM due to state licensing laws. Note that prices are substantially higher on the island than on the mainland; save money by bringing sufficient supplies with you!
Drinking water can be obtained from taps in various campsites and from a tap on the beach 500m north of Eurong; untreated water from the creeks or lakes should not be drunk.