Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
[Why is it absolutely leak-proof?] Kamiizumi water bottles feature a "double-layered leak-proof" design cap, which creates a completely sealed space when the lid is closed, completely eliminating the possibility of leaks. Please refer to the third image for a detailed explanation of the design. Additionally, an air valve is designed into the cap to equalize the air pressure inside and outside the bottle. This means that even if steam is generated by shaking the bottle in your bag, you won't have to worry about getting burned by steam when you open it.
[Easy one-handed opening in one second] Simply press the button on the lid with one hand and the lid will open automatically. Closing is also super easy; just push the lid down with one hand. This method is carefully designed for drivers, and its large opening makes it extremely convenient.
[Strong heat and cold retention] According to test data from the Kamiizumi R&D department, when 100°C water was poured into the bottle, the temperature was 44°C after 24 hours, and the ice melted completely over 36 hours. This is due to the efficient use of vacuum insulation, and our completely sealed cap design further improves the heat retention function.
[All materials are safe and food-grade] All materials used are internationally standard food container materials, so you can use them with confidence. There is no need to worry about odors or color peeling.
[Wide range of usage scenarios] Kamiizumi hopes to meet the various needs of our customers, and can be used in the car, outdoors for camping, sports and fitness, work, cycling, travel and business trips, etc.
This is a newly designed 2025 vacuum insulated mug with one-hand bottle opening. It's perfect for sports, driving, travel, work, and more, keeping drinks hot for 24 hours and cold for 36 hours. Made entirely of food-safe materials, it's safe and convenient. Its large capacity design provides ample space for water storage.
No-delivery refund
