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Title: Nothing comes out!
Review: My 2 year old daughter can suck out one small sip and then I have to open the lid to relieve the pressure so she can take one more drink. This is crazy! The pair I got does not leak....and doesn't allow my daughter to drink either. I've contacted Munchkin and am awaiting their response as to how to return them. There must be some discrepancy in these cups....they either leak or nothing comes out! I wouldn't recommend these to anyone!
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