In a pinch, zap your water
One of the coolest travel gizmos on the market today is the SteriPen, a hand-held device that emits UV light to kill anything and everything that’s growing in your water. It’s great for those times when you’re not sure about the quality of the local water and don’t have access to packaged drinking water. However, bear in mind that it does nothing to filter out chemicals and grit that may be harmful to your system. It’s best for short-term use; for long-term stays in Delhi most people have large jugs of drinking water delivered directly to their homes or use a filtration system that eliminates both microbes and pollutants.