There’s nothing necessarily wrong with “no spill” cups either (a common one being the Munchkin Miracle 360 cup) but to be honest, no cup is completely spill-proof. Often the biggest concern with these types of cups is that parents can accidentally get in the habit of allowing a toddler to walk around, sipping from them throughout the day (which is an even bigger concern if they are sipping on milk or juice). These types of cups are fine for short periods of time or when you’re away from home with your toddler, but make sure your little one is getting practice with drinking out of more than one type of cup, so they can learn how to place their cup gently without spilling.