If you want to stay healthy when travelling or when out and about one of the most important things is access to good, clean water. Often though the water supply can't really be trusted, so it makes sense to go prepared with some sort of water treatment to make it safe. It needn't be complicated or expensive - generally you can get by with just a few water treatment tablets or drops.
If you're unlucky though and you do end up with a dodgy tummy staying hydrated is very important - so it's well worth taking a few sachets of Oral Rehydration Salts as well just in case...
