Finally, a tower with 4 cups transparent and not opaque as other brands. Bought a very decent rate 6.90. They can contain over 18 spoons 30 ml of milk powder each. So large capacity enough, we can do 4 bottles of 330ml. Tower equipped spout so easy to use, but brittle at the leg which holds this plug will be seen over time. They fit together one inside the other and closed by screw effect.