When you?re out and about the non?-spill valve prevents unwanted spills, and the big handles make it really easy to hold on to ?even one handed! At home, when a few dribbles don?t matter, it?s easy to remove the handles and non-?spill valve so they can hold the cup and practise free flow drinking, which can help their oral development.When you?re out and about the non?-spill valve prevents unwanted spills, and the big handles make it really easy to hold on to ?even one handed! At home, when a few dribbles don?t matter, it?s easy to remove the handles and non-?spill valve so they can hold the cup and practise free flow drinking, which can help their oral development.When you?re out and about the non?-spill valve prevents unwanted spills, and the big handles make it really easy to hold on to ?even one handed! At home, when a few dribbles don?t matter, it?s easy to remove the handles and non-?spill valve so they can hold the cup and practise free flow drinking, which can help their oral development.