... The food grade silicone, without any nitrosamines, withstand the high temperature until 240C(or 464F). It can be boiled disinfection ... safe,100% food grade silicone material,colorless,odorless,nontoxic,high and low temperature resistant(-50~200,sterilizable,ametabolic,keep fresh ... bottle. The lower secondary collar holds the bottle, and flow filter in place, while the main collar includes the cap and ...