http://www.bestbabyfeedingproducts.com/proof-cup/
is there really a leak proof sippy cup i've tried what seems like all of them-they all leak after a day or 2
lol my daughter has bunch of "leak proof" sippy cups and the cups didn't leak for about a month, and when they started leaking i bought new leak proof things to put in the cups lids, but they kept leaking anyways, so i don't know if it's the cup itself or the darn little plastic things that you can buy for the leak proof cups, but the cups still leak, even with a new leak proof stopper in it! i give up, i wish she would start drinking out of a regular cup, but she makes a huge mess with a regular cup!
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