UPDATE: Since posting this review, I’ve received numerous complaints from my readers with concerns about this cup regarding safety and design:
Readers have reached out to me since our initial review about concerns with leaks, battery issues, safety concerns, and other sippy cup struggles. At the time of this original review, the main concern we had was with the light-up Wonder Cup, because it leaked on us. Since the kids hit the bottoms of the cups on the table in order to get the lights to flash, it makes the water kind of shoot upward and splash out. Read on for more details from the brand on how to get these concerns addressed.