Doraemon Fridge
Yippie! Doraemon Fridge!! Am i very excited? Yes, i am. Why am i very excited? Because i was doraemon super fan when i was young and now i still like doraemon. 
No worry with cold water change to warm water anymore after you get Doraemon fridge.
It’s not really a fridge as such, it is a device that can keep 4 bottles (hence the 4L indication) cold or warm, and it runs on 12 and 100v.
Here is the video clip of Doraemon Fridge.