Just Krusin said: Almost forgot, another reason for 2 bottles is the occasional times when there is no water-the death march to Audobon any one.
Or, as happened to me on a long isolated stretch of road, the day you drop your water bottle, hear it bounce, and then go “SWISH” as a car runs over it. (Probably not as big a deal on RAGBRAI, but it made for some rather distressing times on that ride for me.
I always have 2 bottles, (and a camel bak on occassion), I NEVER put gator aid or other drinks in the camel bak, and designate 1 bottle for OTW (Other Than Water).
Steve