The Hopper M30 delivers a wider, easier opening. Through thoughtful engineering and thorough design, the Hopper M30 replaces a zipper with magnets Hydroshield Closure - Uses powerful magnets to create an ultra leak-resistant shield. Wide-mouth opening makes it easy to get in and out. Dual, Quick-Release Buckles ensure that your Hopper won’t open unexpectedly. Coldcell Insulation - Closed-cell foam offers far superior cold-holding to ordinary soft coolers. Leakproof Liner - RF welded seams eliminate stitching and provide a leakproof interior liner and waterproof exterior that resists punctures, and UV rays Double-Stitched Carry Options -Every pick-up point is reinforced. Hopper can handle more weight than you’d prefer to carry. Capacity: 7.2 Gallons, 20 cans, 28 lbs. of ice (just ice).