Klein Tools' reusable ice packs provide plenty of cold without the mess of melting ice. These heavy duty ice packs are designed to quickly freeze and built tough to withstand drops, bumps and thuds. The interlocking pattern keeps the ice packs neatly stacked when freezing or storing. Made with 100-Percent BPA-free non-toxic materials, these ice packs are perfect for lunch boxes and coolers. Reusable ice packs are convenient to use for coolers, lunch boxes and more. Food safe, non-toxic and BPA-free means you can safely use in lunch boxes and coolers with food, drinks, or other perishables. Each ice pack measures 7 x 5.25 x 1.5-Inch (17.8 x 13.3 x 3.8 cm) and the unique shape helps to quickly freeze so they can be used over and over again. Strong and durable to withstand accidental drops, even when frozen. Interlocking design keeps ice packs neatly stacked when freezing or storing. Each 1.1-Pound ice pack is long lasting and when properly frozen overnight, will stay cold for hours.