It used to be you filled a cooler with ice, then dealt with the melty, yucky mess all day long. That’s no longer the case with reusable, re-freezable ice packs. These tough ice packs freeze quickly, hold their cold longer than standard ice, and are ready for service day after day. Any reusable ice pack works better than a cooler full of half-melted cubes, but not all ice packs are the same. Here are three things to think about when you’re shopping for a reusable ice pack.