My 18 month old uses a sippy cup for water but still uses his bottle for milk in the morning and before bed. He uses a nuby 360 sippy cup for his water which he manages fine but he tends to throw it around and it splashes out at times and I don't want to risk that with milk. Can anyone suggest a good sippy cup to use with his milk? I know I'm late making the switch from bottle to cup so keen to get one asap.