Stanley Classic Flask 8 oz w/ Never-Lose Cap Stainless Steel Green The Stanley Classic Flask 8 oz with Never-Lose Cap is a durable and reliable stainless steel water bottle perfect for outdoor adventures. With a screw-on lid and a lifetime manufacturer warranty, this green flask is built to last. The classic design and adventure theme make it a stylish choice for camping, hiking, or any other outdoor activity. Made in China, this flask is designed to keep your beverages at the perfect temperature while you explore the great outdoors.