Amazon Basics Reusable Hard Sided Square Ice Pack, 4 Count, Small,

4-pack of hard-sided square ice packs for temporary cold storage of food, beverages, perishables, and more; dimensions measure 4.75 x 4.75 x 0.5 inches Heavy-duty BPA-free plastic casing for leak-free durability Place in coolers, lunch boxes, bags, storage cases, and more to keep items cold Slim, lightweight design allows for easy, unobtrusive placement in any carrying container Stays cold for hours; prepare ahead of time in home freezer by laying pack flat for 8 hours or more