Disappointing, is not leak-proof

Overall I'm disappointed with these cups. They were supposed to be leak-proof with the plunger piece in place, but they were not. I put one in bed with my daughter for nap and she woke up all wet. The plastic also doesn't seem very durable. She's dropped one of them on our driveway once and now part of the plastic is gouged and is rough. There are also teeth marks on another and she doesn't bite stuff. If I could return these, I would. The do seem to wash up well in the dishwasher, but that doesn't make up for the other issues I have with them.

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