As long as you wash at 65C and then rinse cycle is at 95C, you are fine. It’s glass, not plastic which has ‘pores’ sort of speak. And then if you are still worried you have to sterilise them. I am not yet sure if industrial ways (maybe check how milk companies do it). But you can boil at 95C or put it in the oven at 110C for 20 min.
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