These sippy cups are great. I am not only a stay at home mom but a daycare provider as well. Out of all the kids come in and out of the Daycare I would say 9 out of 10 of them had these playtex sippy cups. I tried different sippy cups on my son to get him off of the bottles and he would not touch any other sippy cups except for these. They are also the only ones that I have found to be actual "spill proof".