When I first went looking for this product I noticed many other peoples reviews (from diferent sites) indicated that they had trouble with this product leaking. This is true. I had this problem also. It will leak at the bottom, where the tube connects to the nipple. To correct this, I simply pulled the tube off, then put a thin layer of Vaseline on the nipple, pushed the tubbing back on (as far as it would go). This stopped the leaking permenantly.
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