What kind of vacuum flask is a good vacuum flask?

First of all, the material must be truly food-grade, 304 stainless steel and 316 stainless steel or other food-grade metals.

Second, the heat preservation time cannot be less than 6 hours, that is, 96°C hot water is put into the cup to start the heat preservation. After 6 hours, the water temperature cannot be lower than 56°C.

Third, in addition to the material of the water cup, the products sold with the water bottle must also reach food grade, such as the spray paint on the surface of the water cup and the silicone seal on the lid of the cup.

Fourth, the production process and structure of the water cup should not be rough. For example, the cup mouth must not have obvious welding bumps, the cup mouth must not be left with sprayed paint, and the edge of the cup lid and other accessories must not be marked

The last is the instruction manual and sales certificate for the water cup.

Dongguan Zhanyi Commodity Technology Co., Ltd. produces thermos cups, children's cups, car cups, business cups, etc. All water cup production adopts strict production management procedures, and there is a corresponding advanced quality management standard for any accessories of the water cup. Buyers from all over the world are welcome to contact our salespersons to obtain samples, and welcome everyone to visit our factory. We are willing to serve you wholeheartedly. To understand us, please visit http://www.umbottle.com