I've read a lot of comments about the case half being flat and wide and the cut out being too small. The one I received has the appearance and size of half a coconut with a reasonably sized neckline. I was very happy with it. I think it just depends on the luck of the draw. I also boiled mine for an hour or so before using them. It released some tannins, killed anything that might have been on it and made sure it didn't float.
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