A mug that keeps cold and hot.
Keeps cold for 12 hours and hot for 6 hours if the outside temperature is opposite
To illustrate the temperature inversion (for example, if the water inside the bottle is cold and the temperature outside is hot, it is considered the opposite)
Washing instructions:
1- Do not put the cup in the dishwasher.
2- Do not put the cup in the microwave.
3- Wash the cup with a soft dish sponge.
4- Do not rub the cup with a wire brush.
5- Do not scrape the writing directly, and do not soak it.