1)PE, Dustproof,Security 2)single stick lable can not be get over after used 3)bottle cap keeps no water leak out Appearance conforms with these requirments: itemstandardproduct surfaceproduct should be full,competely structure, surface and inside is smooth, without apparent shrinkage, bubble, flash and defectcolorcolor equablypollutionno dust, no plastic scrap or other impurities, no obvious ...