413
people found this helpful, as of 2023
ranked #50,160 most helpful
out of 571,544,897 reviews
I received the cups today. Washed them in warm soapy water. Put ice and water in them and watched the lid as it slowly pops open on its own. I cannot let my toddler drink out of it with out having to clean up a mess... this cup is worthless to me. (Sorry for background noise in video)