[Cooling Packs] American "serious" specs! Freezes overnight and provides strong cooling that lasts.

From lunch bento boxes to food ingredients for camping, and drinks to take to festivals. If you want to keep things thoroughly chilled on hot days, you should be particular about your choice of “cooling agents.” The new 2026 model of the high-performance cooling agent "COOLER SHOCK" has a rich lineup and offers an unparalleled cooling effect.

No water injection needed, immediately usable hard type

The high-performance cold pack brand "COOLER SHOCK" from the USA is gaining quiet attention among outdoor enthusiasts.

The technology used in medical settings for blood transport, where even a moment's lapse is unacceptable, has been redesigned for lifestyle use. Utilizing the high thermal conductivity of aluminum pouch material, it achieves both the speed of complete freezing in a standard refrigerator overnight and long-lasting cooling power.

The latest 2026 model has officially introduced the brand's first "pre-filled hard type." While the conventional aluminum pouch type required users to inject water themselves, the new "HARD LONG" and "HARD STRONG" can be used simply by freezing them in the freezer right after purchase.

A rich lineup

"HARD LONG" is a long-lasting cooling model that balances extended cooling duration with short freezing time. Many commercial hard cold packs tend to freeze around 0°C, leading to shorter duration; however, this model adopts a composition that freezes and cools at lower temperature ranges. Sizes S and M are designed to be the same size as a paperback book, making them easy to store in lunch boxes and bags without inconvenience.

"HARD STRONG" is an ultra-low temperature, powerful cooling model that maintains -16°C. It is perfect for preserving ingredients like meat and fish that you absolutely want to keep fresh. Its robust design ensures that even when food is placed on top as a divider or base in a cooler box, it won't collapse.

"SUPER LONG" is a long model that adopts a slim, large-format aluminum package, which reportedly improves cooling performance by up to 20% compared to the conventional COOLER SHOCK Original. With technology applied from blood transport, it achieves a cooling duration suitable for serious camping trips lasting two nights and three days.

Due to its slim design, it is well-suited for uses such as "cooling with a surface" by placing one on top of the cooler box lid or laying it on the bottom, which hardly takes up any food space. The aluminum package quickly absorbs the cold air from the freezer, so if you place it inside the night before, it will be ready by morning.

Personally, I am particularly interested in "BENTO & GO." This compact type is specialized for carrying lunchboxes for commuting and schooling and, of course, can be reused multiple times. It's also a nice point that the outer box and body instructions are completely in Japanese.

Product Name / COOLER SHOCK HARD LONG (Pre-filled hard type, long-lasting cooling model)
Price / Open (Suggested retail: S 880 yen, M 990 yen, L 1540 yen)

Product Name / COOLER SHOCK HARD STRONG (Pre-filled hard type, powerful cooling model)
Price / Open (Suggested retail: S 880 yen, M 990 yen, L 1540 yen)

Product Name / COOLER SHOCK SUPER LONG (Slim large-format aluminum type)
Price / Open (Suggested retail: S 1210 yen, M 1650 yen, L 2530 yen)

Product Name / COOLER SHOCK BENTO & GO (Lunchbox / Daily use)
Price / Open (Suggested retail: 825 yen)

● Tsuda Shokai

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