Almost awesome

My wife wanted these to avoid plastic for our children. She is pretty happy with them. As stated they are spill proof not leak proof. One did seem to develop a tiny split below the mouth place (so it leaks when being drunk from), perhaps it happened when it was being stretched over our cups. These work awesome with the 8 oz narrow-mouth canning jars, which is the only thing we have used! Very easy to get on and adjusted with the tab on one side. Super easy to clean, one finger fits inside the spout. 5 stars if they lasted without splitting.

###

