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How much can I fill it so that it’s safe from the expansion that the freezer causes?
I have never put in freezer. Good idea. I will try that.
DON’t put in in the freezer. You can break the seal on the vacuum and it won’t work at all after that.
I too it against the side so she the cube melts it doesn’t restrict flow as it melts.I usually fill 1/3-1/2.
i just put ice in the bottle still cold next day i never put in freezer the best bottle i ever had
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