Malaysia: tap water is treated but bottled or filtered water is the safer default.
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Tap water is treated but many locals boil it before drinking — bottled or filtered water is the safer default for visitors, especially outside Kuala Lumpur.
Extend the same caution to ice as to tap water in Malaysia — it's easy to overlook, but ice carries the same risk unless you know it's made from purified water.
Brushing your teeth with tap water is usually fine even where drinking it isn't recommended, but if you want to be extra cautious in Malaysia, use bottled water for that too.
Sealed bottled water from a reputable brand is widely available and the simplest safe option in Malaysia — just check the seal is intact before drinking.
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