Just got a Frank green stainless steel cup for my birthday, but I don't get what the filter thing is for, and nowhere on the website even mentions it.
Any ideas?
Fiiter? are you talking about the button mechanism in the lid?
@NurseHolliday started
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Just got a Frank green stainless steel cup for my birthday, but I don't get what the filter thing is for, and nowhere on the website even mentions it.
Any ideas?