Replying to Water reservoir and inner gloves

Hey folks.

I'm skiing this entire season in the french alps, and i got an osprey bag with room for a water reservoir. Anything to look out for really, or is it just about buying the first one i see? Do they never break if i happen to land on the bag?

Also, i hate it, but whatever glove i wear my hands will be cold. Will inner gloves do the job. And again, do i buy the first fucking glove i see, or should i be careful with some materials etc.?

Thanks in advantage!