Agree on the ability to add packets. EmergenC packs are nice to bring with. I also like the bottle for that cold fresh water and save the bladder for when you need it.If you have to carry a bottle, Nalgene bottles are pretty indestructible. They at least use to make the "oasis" which was a canteen but I would just buy a regular bottle. I typically run a Source hydro bladder, but if I am going to be far from truck/supplies etc or backpacking I will run both. It is nice to have the bottle option as a redundancy on the outside chance the bladder leaks and/or you have some kind of caffeine or electrolytes you want to mix with water.