The Acre Series water bottles feature a distinct design inspired by the collection and are made using the Specialized Purist bottle technology. The Purist Bottle utilizes an advanced amorphous silicon dioxide coating, fused directly into its inner wall. This unique glass-like layer naturally resists stains and odors, preventing any residual flavors from lingering and keeping your water tasting pure, even on the hottest days. It's like drinking from a pristine glass, without the risk of plastic flavor seepage.This protective coating measures only 20 nanometers in thickness-less than 1/5,000th of the width of a human hair. The bottle's form is also crafted for an ideal grip, fitting comfortably in both your hand and bike cage.For cleaning, a simple rinse and dry is recommended or simply place it on the top rack of your dishwasher for safe washing.