Thanks it's beautiful, very very soft and drapes well. 95% wool and 5% cashmere.
These bottles, and the ones they use for bottled water etc aren't designed for multi use. Reason being that landfills all over the world are filling up with them and they used to take 20 years or so to break down. So now they but special additives (which aren't harmful) in to the plastic to help it breakdown quicker and quicker. With repeated use over and over again, you'll notice the plastic get softer and squeezier, which is it starting to break down. It's got nothing to do with BPA (mostly a media hype up), which is found in very little plastic types to begin with but it can be harmful. Plastic is made from petrol after all. Best bet is to go to Rebel sport or your local bike shop and buy a plastic (or metal) one designed for repeated use, usually for as little as $8 each.