YETI. 18025180000 YHOPM30. NAVY. Our carry-the-day tough-as-nails Hopper soft cooler has one big update. We ve re-engineered the opening to offer a wide mouth for easy loading and unloading. It closes almost on its own with our HydroShield Technology -- a strip of ultra-strong magnets -- then is secured with two Quick-Release Buckles to ensure it can withstand being tossed around.