Top positive review
Magic valve makes Munchkin sippy cups leak proof!
on March 25, 2017
I have a couple of the Munchkin sippy cups that have managed to lose their valves. I think I dropped one into the garbage disposal when I took it off to clean it. Oops! I believe these valves are the magic ingredient that keeps these sippy cups from leaking when all the others I've purchased have leaked. Interesting note: I used these Munchkin sippy cups when my kids were little. Spent lots of money on other brands and they all leaked, either immediately or soon after. Today, my granddaughter uses the same sippy cups with these same flexible inserts inside the lid. They still work really well. Thank you, Munchkin!