1.Using high-tech food grade plastic, removing exceptional plastic odors 2.Hold the intensity of 150 times of glass 3.Keeping original shaple between -30~92 centigrade degrree. 4.Have used transparency of glass 90%of the materials 5.Very steadyto the acid,alkaline,oil,alcohol of the food. No influence to the color and the taste of the food. 6Pass US FAD and NSF authentication, harmless to the human body.