YETI Thin Ice Pack – Ultra-slim and conveniently lightweight, YETI THIN ICE is designed to completely substitute the need for regular ice inside your YETI Hopper Soft Cooler and Daytrip Lunch Bag and Box. Yep, that means you dont have to sacrifice precious cooler space for rogue ice cubes, because that real estate is better spent on bigger sandwiches and double the chips. Now available in three sizes.