Here is a cold weather kit to adapt your camelbak for winter use.
I am still looking for a perfect solution for cycling. I think I have one for running though...
The other day I was out on a run and was stuck with a mouthful of GU and a block of ice. I decided that there had to be a better way. Now I fill the bottles half full. Sloshing water takes longer to freeze because it is moving or the bouncing up and down breaks up the ice better.
regards,
Dan