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Title: Great brush, not for small neck bottles however
Review: As noted in other reviews, this brush works great for wide mouth Nalgene bottles. But, approximately 7/8" in diameter with brushes compressed, it wont fit a bottle with a "Grolsch" type neck, which is less than 3/4" wide. (I got these from Ikea to store homemade syrups) I haven't tested the small neck Nalgene bottles. I just tried it on the GSI 10oz flask. It doesn't fit through the neck, however.
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