... ended up when my young grandkids saw them they loved having their drinks of water from them

I ordered these to travel with and ended up when my young grandkids saw them they loved having their drinks of water from them. ( They did colapse too easily) So fascinated with how they can colapse and pull back up. We have not been able to use the largest one because there is a place on the top of the rim where it is jagged therefore not safe to use. I had not checked the whole set thoroughly and the time had passed where it was too late to return back to Amazon. Wish that there was a way to replace the large one.. Thanks.

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