smart silicone bottle cap 1.100% food grade silicone 2.Past RoHS,SGS,FDA 3.Use for bottle ... 4.Non-toxic,tasteless,healthy 100% Food Grade Silicone Bottle Cap:1, Material: 100% food grade silicone2, Hardness: Between 20~70 shore ... -friendly etc.5, Property: high/low temperature resistance, oil and fuel resistance, water resistance, weathering resistance, Ozone resistance etc.6, Certification ...