Cooler Shock Reusable Ice Packs for Cooler - Long Lasting Cold Freezer Packs for Coolers and Lunch Boxes - Cooler Ice Packs for Camping Gear, Fishing, Road Trips, Beach Must HavesLASTING COLD Our durable ice packs for coolers and lunch boxes are colder than ice at 18 F ( 8 C) to keep your favorite foods and soft drinks chilled for up to 48 hrs. EASY TO USE Filling these thin reusable cooler packs is easy freezy! Simply, add water once using the included funnel, shake, screw cap on, & freeze until ready to use. STRONG Robust and resilient, these cooler and lunch box ice packs are nylon reinforced for seamless freezer to lunch