I must say that I'm really relieved to see that more people than I struggle to reach the water bottle...
I used to only be able to drink going downhill as then I wouldn't have to spin, but now I manage to both moving the pedals around, picking up the water bottle, spilling it all over me, choking and drinking at the same time. My boyfriend always laughs his head off whenever I do my drinking/choking/spilling routine, but then always encourages me when I don't fall off.
I have an acquaintance who had her road bike debut on Oslo Triathlon (Norwegian championship in triathlon), and she had to race with a camelbak. And won! Apparently the following conversations took place between her boyfriend and my boyfriend:
My boyfriend: Did she have speed trial bike then?
Her boyfriend: Are you mad? She didn't even dare to use the lower position on her handle bar! She raced with a Camelbak, because she was worried she'd fall off is she reached for the bottle! :)
