I get about half my water bottles along the road-side. After careful sanitizing they are good to go. The rest I pick up free at cycling events. I got 4 Specialized water bottles at my LBS for turning in 4 old tires. I got a dozen at a triathalon rest stop when full water bottles were handed up to the racers. One swig of water then the bottles were ditched around the next corner where I waited.