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Title: Nope, they don't leak...
Review: These lids do not leak. But the minute my child drops one from his high chair, the whole lid comes off. If he drops it hard enough, the lid comes off and the nipple insert pops out. It's very dramatic and not at all the purpose of a sippy cup. Trust me, we've tried hard, but there is NO WAY to put these lids on tightly enough that he can't perform this "trick."
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