They are reusable. There is an initial "just add water" setup to change the dry powder to gel, then you throw them in the freezer for several hours and they are ready for use.

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 Haves

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 Haves

Q: How long do these stay frozen for ?

Mine have stayed frozen for approximately 9-10 hrs. I left food in the cooler,which was well-insulated, and it which was still cold when I got home. This was kept in office setting with temps in room in the 70’s.

Q: When you say that this item is colder than ice, what does that mean? ice can be cooled to any temperature unless i'm mistaken. a rock can be 18*f.

Karæthon's answer is correct. Freezing or melting overcomes the "latent heat of fusion" which is about the same heat as is required to raise the temperature of (for example) liquid water by almost 80°F, or frozen water (ice) by about 150°F. So an ice pack in a cooler will spend most of its time at it's melting point. Once it's all melted, the subsequent temperature rise will be very quick.

Q: If I were to use two of these together, would I have similar cooling capacity as one of the medium-sized packs?

Not positive of that but I am amazed at how well these things work. 4 of them keeps a large cooler super cold.

Product ID: 54075173

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Details

Brand
Cooler Shock
Color
Silver
Material
Ice Packs
Package Information
Box
Product Dimensions
1"D x 6.5"W x
Item Weight
0.6 Pounds

🎒Compact 5x7 inch size

🧊Reusable & refillable with funnel

❄️Coldest at 18°F (-8°C)

Frequently Bought Together

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 Haves

Cooler Shock Ice Packs - Reusable, Premium, Large Pack and Lunch Set for Long Term Use - Cools Faster Than Ice - Cooler Accessories

Cool Coolers by Fit + Fresh Slim Compact Reusable XL Ice Pack, Perfect for Lunch Boxes, Coolers, and Beach Bags

Description

❄️ Stay Cool, Stay Ahead: The Ice Pack That Works as Hard as You Do

ALL DAY CHILL POWER - Keeps your food & drinks colder than ice for hours, perfect for long workdays or outdoor adventures.
DURABLE TRAVEL READY - Nylon-reinforced design ensures these packs survive backpacks, coolers, and rugged trips.
EFFORTLESS FREEZE FILL - Includes a handy funnel for quick water fill, then just freeze—no mess, no hassle.
THE ULTIMATE OUTDOOR GIFT - A must-have for campers, fishers, and road trippers who refuse to compromise on freshness.
VERSATILE LUNCHBOX ESSENTIAL - Ideal size for lunch bags, coolers, and totes—keep salads, yogurts, and drinks perfectly chilled.

Cooler Shock Reusable Ice Packs deliver long-lasting cold at 18°F (-8°C) with a durable, nylon-reinforced design. Sized perfectly at 5x7 inches, these portable packs come with a funnel for easy filling and are ideal for lunch boxes, coolers, and outdoor gear—making them essential for professionals and adventurers who demand freshness on the go.

Specifications

Brand	Cooler Shock
Color	Silver
Material	Ice Packs
Package Information	Box
Product Dimensions	1"D x 6.5"W x 7.5"H
Item Weight	0.6 Pounds
Special Feature	Portable
Included Components	funnel
Model Name	Ice Packs
Product Care Instructions	Freeze when not in use
Insulation Material	Polyethylene
Chamber Depth	6.5 Inches
UPC	854850006251
Size	Lunch Box Size 5-Pack
Manufacturer	Cooler Shock
Item Package Dimensions L x W x H	8.15 x 7.8 x 1.97 inches
Package Weight	0.33 Kilograms
Item Dimensions LxWxH	6.5 x 7.5 x 1 inches
Brand Name	Cooler Shock
Number of Items	5
Part Number	43237-2
Style	Lunch Box Size 5-pack

Have a Question? See What Others Asked

How long do these stay frozen for ?

When you say that this item is colder than ice, what does that mean? ice can be cooled to any temperature unless i'm mistaken. a rock can be 18*f.

Are these reusable?

If I were to use two of these together, would I have similar cooling capacity as one of the medium-sized packs?

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