Easy to Use: Simply fill the included funnel with 28 oz of water. Start by adding a small amount of water to activate the reusable cooler ice packs, then wait a moment before pouring in the rest. Freeze, and you’re ready to go! Long-Lasting Cooling: Designed to keep food and drinks cold for 24–48 hours, these ice packs are the perfect companion for any adventure—whether it’s a road trip, picnic, or day at the beach. They’re even great for Yeti coolers! Space-Saving Design: Each ice pack measures 9.7" x 9.8" and features leak-proof plugs, so no messy spills—even upside down. Ditch bulky traditional ice and enjoy compact, efficient cooling for lunches or coolers. Perfect for Any Adventure: From camping and fishing to tailgating and beach days, these reusable ice packs work anywhere. They’re the ultimate freezer packs for coolers, making them a must-have for outdoor enthusiasts. Advanced Cooling: Using phase-change technology that activates at 18°F, these ice packs deliver superior, longer-lasting cooling. Whether for meal prep or outdoor trips, they’re the smart solution for all your cooling needs. Reusable Ice Packs for Cooler, 4 Pack Freezer Ice Packs, Cooler Ice Packs for Cooler Bag Backpacks, Lunch Box, Cooler Bag, Keeps Food Cold Fresh