Fastest time to drink 500 ml water

The fastest time to drink 500ml water is 1.75 seconds, and was achieved by Tim Cocker (UK), during the XFM Breakfast Show in Manchester, UK, on 9 December 2014.

This record was broken on the Guinness World Record Challengers site (Challengers' tag: xfmbreakfast): http://challengers.guinnessworldrecords.com/challenges/1-fastest-time-to-drink-500ml-water/attempts/6121