The Brooks handheld is ideal for carrying your fluid on long runs. It holds about 1pint (600ML approx) and has a pouch for gels or even keys! The main advantage over the doughnut style bottle is that the Brooks Handheld does not require a constant hand grip - the soft thin neoprene strap holds it in place so that you don't get aching fingers and hands. Oh and by the way, it fits for both left and right handed! You can see the accessories at
www.brooksrunning.co.uk You can get your local Brooks stockist to order it and it costs £10.