I use the blaze orange color "construction" model Camelback for summer riding in Arizona and when touring and am very happy with it. I'm a firm believer in being as visible as possible and think a brightly-colored Camelback makes a lot more sense than the usual dark-colored ones. The 70 oz capacity has always been adequate for me; if not for a full day's riding, it's enough to get to somewhere to refill. If I think more water might be needed, I add a waterbottle or two. I prefer that to carrying more on my back. The construction model Camelbacks aren't as comfortable looking -- no padded shoulder straps, but that's no problem. My only complaint about the blaze orange model is that over time, the strong Arizona sun fades the color so it isn't as bright. I tried painting it with blaze orange paint; that brightened it up, but then the paint faded also. I ended up buying a new blaze orange one.