Original post by: Brett Hartt

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When it’s cold in the office I microwave one and put it in my shoes to keep my toes warm (Don’t try walking on it when it’s hot though). It should be fine to freeze as well, but be careful flexing the iOpener when it’s cold, because the outer casing can get brittle when it’s super cold, so if you try and bend it too much it might crack and then leak once the filling has melted.

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