This model is the origin of GEL-COOL. Recommended as a sub case.

This model is the origin of GEL-COOL, which was launched in 2006. It won the Good Design Award.
This is the limited color for 2023.

The S size is just right for holding fruits, salads and side dishes. The M size (400ml) and L size (500ml) are also available in the same square series, so we recommend using them together.

In 2023, the product was renewed for easier use.
[Renewal points]
The inner surface has been treated with a patented "rakushigo-technique," making it more resistant to stains and less likely to show scratches.
The curved indentation on the clasp makes it easier to open by catching the fingers.
The outer surface has been changed from a glossy finish to an elegant matte finish.

[About GEL-COOL]
GEL-COOL has a special technology to seal a refrigerant inside the lid, and the entire lid is frozen in a refrigerator for use. In other words, the lid becomes a refrigerant.
This makes perfect sense because cold air flows from the top down.
It is also easy to use. When you are done eating, simply wash it and store the lid in the freezer.
When you are ready to use it, just take it out of the freezer and put the lid on the lunch box and you are good to go.
Even on warm days, you can take it with you without worry.
You will never forget to put in the coolant, and you can use it over and over again. If you remove the lid, you can also put it in the microwave.

GEL-COOL helps you enjoy a comfortable lunch box life, freeing you from the worry of food poisoning and the stress of daily use of refrigerant.

[Approximate cooling effect (below 20 ℃)
When food chilled in a refrigerator (5 ℃) is placed in the container, it will keep for about 4 hours at an outside temperature of 25 ℃.
*It is said that bacteria become more active at temperatures above 25°C.