YETI Thin Ice is a groundbreaking innovation designed to be nearly 50% slimmer than YETI Ice and engineered to completely replace the need for regular ice inside your Hopper Soft Coolers and Daytrip lunch bag and box. That way you dont have to choose between saving space and keeping your goods fresh for as long as possible. Even more its built to be lightweight so you wont feel held back when youre trekking through puddles or hiking up hills.