Fit & Fresh Cool Coolers Slim Reusable Ice Packs for Lunch Boxes, Lunch Bags and Coolers, Set of 4, Multicolored PERFECT SIZE: Ideal for everyday use. Each ice pack measures 4.75" x 4.75" x 0.25" KEEPS FOOD COLD: 4 reusable non-toxic, BPA-free ice packs; multicolored set includes 1 blue, 1 purple, 1 yellow and 1 red CONVENIENT: Fits into all types of lunch bags, lunch boxes, coolers and grocery totes SLIM DESIGN: Great for using in tight spaces or stack several together for greater cooling power CARE TIPS: Hand wash only. Do not microwave