... Features: (1),safe silicone material,colorless,odorless,nontoxic,high and low temperature resistant(-50~200,sterilizable,ametabolic,keep fresh) ( ... from sucking excessive air,reduce the phenomenon of flatus,disgorge and hiccup. (7),unbreakable design for outdoor use. Preservation ... . Caution: (1): Sterilize before using boiling water and store in a clean and safe place to mantain the health of your ...