2x750ml water bottles on the bike and a couple of foil wrapped "nuun" (or similar) tablets in the rule #29 breaking European Posterior Man Satchel just in case I have to dive into a shop/petrol station and buy an extra litre of water. Of course, in good old sunny Yorkshire, it's seldom that bad, but if all else fails, well - frankly, I call in a pub and buy a pint and sit in the beer garden and enjoy it, then get the barmaid to fill one of my bidon's for the rest of the ride.

This type of supposedly aero bottle holder was developed for Tri riders to keep the bottles in the riders wake (it attaches to the saddle rails). They dont look great and can be a bit rattley, but if used in conjunction with your two frame holders, that should give you plenty to drink. I can imagine that if I was riding around Arizona, I would need a trailer with a couple of gallons on it.



http://www.chainreactioncycles.com/us/en/profile-design-aqua-water-bottle-system-standard/rp-prod46011?utm_source=Google&utm_medium=Shopping&utm_name=UnitedKingdom&gclid=CjgKEAjwuMmdBRDljdfi2_qQpxkSJADDCRwsz5U9gD1uUZ_3H5un6-XVj8TKH5h9E4AjtT_i1Vc7ifD_BwE&gclsrc=aw.ds

This type of supposedly aero bottle holder was developed for Tri riders to keep the bottles in the riders wake (it attaches to the saddle rails). They dont look great and can be a bit rattley, but if used in conjunction with your two frame holders, that should give you plenty to drink. I can imagine that if I was riding around Arizona, I would need a trailer with a couple of gallons on it.

I was thinking the same thing, but if the OP goes through a bottle every 30 mins, it's going to be unrealistic to carry enough bottles for a century ride.

Either
- learn/train to not need so much water (which will only help the problem, not solve it).
- make friends with a big camelbak
- accept that you're going to have to stop a few times to refil.

not minutes, but miles.

Ah, totally misread that. In that case, a holder like above may well be a viable option for you.

First if you are only drinking on bottle every thirty miles you are not drinking enough. One bottle an hour with moderate temps. When it gets hot you need more. What I do is plan my routes to include places I can buy water as needed or stops where there is a public source such as a developed campground or park. Some rides I set cache of water in gallon jugs in places that make sense.

This. I don't think I would do an unsupported century without knowing there are guaranteed sources of clean water. I'm not sure it would be possible to carry enough water for 100 miles in the Arizona heat. Platypus makes reservoirs that hold 2 and 3 liters but you pretty much have to have a frame pack to carry that much.

It doesn't look like you have the handle bars but when I road a century ride back in earlier June all these folks had this huge square bottle stuck between those handle bars that stick out straight in the front with big rubber straws. It looked very weird but they sure had a lot of water. I wish I had a picture. I've also seen double water bottle holders on the frame plus double water bottle holders under the seat. And unless you are riding where there is no where to stop to fill up, many places will let you fill a bottle with water for free. And I saw a lot of people who had saddle bags that they stashed their extra water in. Its weight at first but as you ride, that weigh it going to be gone.

In GA, 2 bottles will only get a person through about 50 miles. You could put a couple bottles in your back shirt pockets and disposing of the bottles when empty. That will give you 4. I would just plan a stop.

By the way, who bothers to bring a heavy lock and lock up the bike when making such convenience stops for water and such?

My road bike is old, so I usually don't bother, but the thought has crossed my mind someone might steal it anyway by just tossing it in the back of a pickup truck. What a pain to be stranded then.

I've also ridden on with increasing dehydration because I dont have the confidence to leave my bike outside a shop on a busy road. Earlier this year I road the last 30 of an 85m jaunt with no fluids at all , just because all the shops I passed were facing straight onto the road. I favour forecourts generally, as they are glass fronted and allow me to keep an eye on my steed, plus they have security which would hopefully deter most opportunists.