Cooler Shock Reusable Ice Packs for Coolers 5-Pack — 8.5x7.5in Thin Freezer Packs, 48-Hour Phase-Change Cold

Cooler Shock Reusable Ice Packs are refillable, nylon-reinforced gel packs that hold a steady cold for up to 48 hours and replace bulky ice in coolers and totes.

These 8.5" x 7.5" x 1" freezer packs are built to fit many common coolers, beach totes, and lunch boxes while freeing space and avoiding soggy messes from melting ice. Each pack includes a funnel for easy filling, a durable cap, and a phase-change formula that targets a ~18°F freeze point so your perishables stay colder longer than plain ice. Sold as a 5-pack, they give you flexible coverage across compartments or multiple outings.

How do these packs keep things cold longer than regular ice?

The Cooler Shock formula is a phase-change gel engineered to maintain a targeted cold temperature as it slowly melts, absorbing heat at a steady rate. Because it’s designed to linger near 18°F while melting, it reduces temperature spikes that commonly occur with ordinary ice.

• Phase-change gel holds a consistent low temperature longer than water ice.
• Nylon-reinforced exterior resists punctures and repeated freeze cycles.
• Displaces free water so cooler contents remain drier and easier to organize.

How do I prepare and use these freezer packs?

Preparation is simple: add water through the included funnel, tighten the cap, shake to settle the gel, and place the pack in the freezer flat until fully solid. Use several packs distributed around items or layer them at the top and bottom of the cooler for even cooling.

• Fill once with tap water, screw the cap tight, and freeze flat for best results.
• Use multiple packs to create a cold wall or place under and above perishables.
• Measure your cooler interior first to confirm fit and maximize usable space.

How much ice do these packs replace and how does that affect cooler space?

Each 8.5" x 7.5" pack displaces roughly 5–6 pounds of bagged ice, so one or two packs dramatically reduce the volume of loose ice needed. That means more room for food, drinks, and gear while still delivering comparable or better cooling performance.

• Each pack replaces several pounds of loose ice, freeing cooler capacity.
• Flat, thin profile stacks cleanly against items for an organized cooler layout.
• Less meltwater to manage—no soggy produce or diluted beverages.

Who this is for: These Cooler Shock packs suit campers, anglers, beachgoers, road-trippers, and anyone who wants reliable, reusable cold without the hassle of buying and disposing of ice. They’re especially useful for families packing lunches, groups using medium to large coolers, and outdoor enthusiasts who need dependable cold over multi-day trips. Make sure to check your cooler dimensions before buying to ensure the 8.5" x 7.5" size fits your setup.