Folding glass practical security cracking

- Jan 13, 2017-

Drink of choice should be glass, especially in Office and home users. Permeability of glass not only look good, but in all the cups, and most health and safety glass. Glass cup by inorganic Portland class fired and into, in fired of process in the not containing organic of chemical material, dang people with glass cup water or other drinks of when, without worried chemical material will was drink into belly in to; and glass surface smooth, easy cleaning, bacteria and dirt not easy in cup wall breeding, so people with glass cup water is most health, and most security of. The only caveat is that most afraid of thermal expansion and contraction of the glass, glass cups at once into hot water temperature is too low to prevent bursting.