WIDE MOUTH FLEX STRAW LIDDrink it in. Our durable Wide Mouth Straw Lid lets you add perfect sipping to all your outdoor adventures. It works with all Wide Mouth bottles and, thanks to the handy finger loop, you can clip your favourite Hydro Flask to your pack. The Straw Lid comes in four colours, so you can mix and match to create something thats as unique as your next adventure. Please note: The Wide Mouth Straw Lid is not leak proof The straw lid comes complete with two