Associated Press Health Concerns Resurface Over Chemical Used in Hard-Plastic Polycarbonate Water Bottles ROCHESTER, N.Y., Catching his breath at a fitness club, Matt McHugh took a gulp of water from his trusty, hard-plastic Nalgene bottle and pondered the idea of switching to an alternative made of glass, stainless steel or another kind of plastic. Worries about a hormone-mimicking chemical used in the trendy sports accessory led a major Canadian retailer to remove Nalgene and other polycarbonate plastic containers from store shelves in early December. "It's definitely a concern but I'd like to learn more before I make any decisions about...