Submitted By: Erin Carpenter   Date: 08/15/2008 These cups are wonderful. My two oldest kids (2 and 3 now) have been using these cups since they each turned one. The only time I had any problem is when one got thrown down from the table and landed on the hard floor just right, to crack the lid. I've had the same cups for more than a year now, and haven't even needed to replace the valves.
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