The Aria Tritan™ Water Bottle features a twist lid spout release for convenient. The specially designed lid protects the spout from dirt and debris when not in use. 100% BPA free; 20 ounce water bottle is made out of Tritan™, which provides high impact resistance, and won’t stain or retain odors. When using the water bottle at high altitudes, such as during an airplane flight or when bottle is exposed to prolonged hot temperatures, such as in an enclosed car, slightly opens the lid to relieve pressure, and then reseals the lid before use. Hand wash only, do not place in dishwasher.