Right Ive been asked at least twenty times on how I ran the Skyline race without any bottles.
I simply stashed three lots of water in bags.
The hassle of carrying water in bottles to me doesnt work. Okay if its a race whereby you cannot get water en route then fair enough.
The ziplock bags are the ones you need.
Just put some water in these bags and seal them and hide them.
Stick your gels etc in with the water and your sorted.
The bonus is once you have either drank the water or tipped it over you. ( Yes I left one nearly full and after drinking the lesser full bag I tipped it over me), you simply shove the empty bags in your bumbag. Unlike empty bottles which are bulky and clumsy to carry to the finish.