I drink a lot in my 'normal' life, probably 6-7 pints during the day just sat at my desk, but I don't really drink much on the bike at all. Went out last weekend in the heat and did 4 hours with a single 750ml bottle, although I did neck a 500ml bottle at the top of Leith Hill.

I don't carry a water bottle riding to and from work, which is just over 10 miles.

I used to use a camelbak but they're too heavy. I now just wrap myself in clingfilm and capture and drink my own sweat.

Plus- the ladies love it

I've just bought one of these