'Raw water': A dangerous new health craze?
Media playback is unsupported on your device
Video

'Raw water': A dangerous new health craze?

Start-ups in the US have started selling untreated water, taken straight from wild springs, for £4 per litre.

But according to experts, drinking "raw water" can be dangerous unless it is boiled first.

  • 08 Jan 2018
Go to next video: Runny eggs declared 'safe to eat'