I absolutely love this cup. The moment I took this cup out of the box, I fell in love with it. Its craftsmanship was very exquisite, the elegant appearance and comfortable touch make me hardly put it down, to the point where I once thought it was a piece of art. The cup body is made of food grade stainless steel, and the cup cover is made of high transparency resin, allowing for a clear view of its internal water level, In addition, it has an additional magnetic rotor compared to regular coffee cups. It is made of 316 medical grade stainless steel, which is absolutely safe without worrying about health issues.When I received it, I couldn't wait to test its effect with a joyful mood. There was a capacity mark inside the cup, which made it easy for me to pour out the amount of water I wanted, then I added my coffee to the cup, and the result exceeded my expectations. After a few seconds, the coffee powder completely dissolved in water, I also tested my protein powder and milk tea, and the effect was equally good. All powders are soluble in water, and both the stirring effect and stirring speed are better than spoons. After drinking my coffee, I cleaned the cup with water and found that it didn't need to be washed by hand. After adding water, I made the cup work and stirred the water, which freed up my hands. It is very suitable for lazy people like me.I am gonna get my mom and dad one for Christmas this year! If you haven't figured out what Christmas gift to give to your relatives or friends yet, don't hesitate, go buy it now. highly recommended.