Review on Customizable 9Oz Pink Insulated Sippy Cup - Munchkin Miracle 360 + Stickers! by Molly Carlson

My 4 year old always asks for ice water, so it's nice that this is an insulated cup! We now own quite a few of these Munchkin cups with this type of silicon membrane. They will leak a little bit if you shake them super vigorously, but they are amazing at preventing a giant catastrophe which is an absolute MUST in my house because our 4 year old is a human tornado! Just don't put drinks that could stain in this. We stick to water and apple juice. Because of the option to place a name label on this, it's the best cup for our son to take to school!