A tough-nut Tritan flask which doesn’t keep hold of tastes or odors. You can depend on the watertight design and impact resistant material to stay strong in the toughest conditions. Travel Tip: This flask has been tried and tested by explorers at the North Pole. Made from lightweight, tough Tritan copolyester Extremely strong with high impact resistance Screw-on plastic lid with retaining loop Translucent finish with measuring markers Doesn't retain tastes or odors Wide-mouth top Watertight design BPA ("Bisphenol A") free