Hi Annette,
I've just started doing long runs for which I need to take water and I've found a belt with a bottle holder and pockets works for me. You have to get used to getting the bottle out of the holder whilst running but once you've got the hang of it then it's easy. Also you've got somewhere to put your keys, emergency money, plasters etc. Mine only cost £8.99 from Sweatshop.
Susie