For those who haven't been to Bali before be warned: you cannot drink the tap water there.
This means you can't brush your teeth in it, rinse your mouth out or use it for making ice...unless you'd like a few days on the toilet or in bed.
All hotels provide, free of charge, several small bottles of water a day, these are mainly used for brushing your teeth. As for drinking water, it's very cheap from local mini marts. 1.5 Litre bottles can be bought for around 4,500 rupiah, about $0.50.
The water is absolutely fine for bathing in and the hotels we've recommended do an excellent job of keeping the pools clean. The ice used in drinks from bars and restaurants is fine - it used to be a big problem in Bali until the government stepped in an regulated this.
Again, keep your hygiene in mind and you'll survive this trip just fine. Wash your hands often, use a hand sanitiser and only drink bottled water!
