I don't know if the vacuum flask you are talking about is a stainless steel vacuum flask or a glass vacuum flask. Since you mentioned the cup before, this is the stainless steel thermos cup.
Choose the place where the glass needs attention.
1 has high hardness.
High chemical stability, that is, when contacting with internal liquid, no chemical reaction occurs and no substances harmful to human body are produced.
3 High light transmittance.
4 unique design style
5 Look at your needs and see if it is heat-resistant.
High borosilicate glass meets all the above requirements. High borosilicate glass is widely used in medicine, solar energy and other fields, and has been widely promoted in developed countries such as the United States, Germany and Britain.
Pay attention to stainless steel thermos cups.
1 stainless steel models include 20 1, 430 and 304. Among several models, 304 stainless steel is the best. 304 stainless steel is widely used in food and medical industry.
2. The process of the external paint of the thermos cup determines whether the external paint will fall off with the use time.
Pay attention to ceramic cups.
Many ceramics are painted, and the pigments in the paintings contain heavy metals, which are harmful to human body. Ceramic painting is divided into underglaze color, underglaze color and underglaze color.
Under-glaze color means that the pigment in the painting is under the glaze layer and will not penetrate into the water, so there will be no heavy metal seepage. Compared with glaze color, glaze color is the safest.
Pay attention to the purple sand cup.
Three "misdeeds" reveal the true face of "garbage pot"
1, the color of the pot is red, which is extremely bright.
2. The sound made when knocking on the lid and body of the pot is particularly crisp and loud.
3, the pot feels particularly smooth and delicate, shiny.