Good Sealing Performance: Every bottle comes with cap, lid fit perfectly and has no signs of leakage. Easy to take the cap off: Easy to disassemble, Just turn the cap gently anticlockwise then they should be separated easily. Clear Glass Bottles with Scale: Transparent color, helps user Clearly see the color of liquid inside the bottle and capacity. Material: Clear borosilicate glass; Cap material: pp (polypropylene); Gasket material: pe (polyethylene). Safe, secure and convenient packaging.