It's not for everyone, but this is why I love my hydration pack. There's no excuse for not drinking enough and it kind of becomes a habit to grab the nozzle on your shoulder and drink. You can take quick splashes on a frequent basis without having to worry about messing with the water bottle and your position all the time. But then, I'm not very good at getting to my water bottle without disrupting my riding flow so others might not have annoyance at the drinking process as part of the reason they don't drink enough.