Canned beverages that quickly become slimy in the summer. I found an ice pack that could be easily dealt with at the 300 yen shop "3COINS", so I tried it.


A round ice pack with a diameter of 6.6 cm and two silicon bands are included for 300 yen (excluding tax). Before use, chill in the freezer for at least 6 hours and secure it to the bottom of the can with a silicone band before use. Since it swells, it wobbles a little when placed on the table, but it did not fall or fall while drinking.





When I left it at room temperature for more than 1 hour, the temperature of the drink, which was about 5 degrees, rose to 12 degrees, but when I drank it, it still felt "cold". Normally, the contents will decrease, so it is efficient to cool only the bottom.


If you put only the ice pack in a commercially available PET bottle cover, you can use it to keep the PET bottle cold. You can't expect the same cold insulation effect as a vacuum insulation tumbler, but it's compact and easy to carry, so it seems useful to have one!