Diminishing Milk

The magician presents a set of differente glasses and fills the largest one with milk to the top. The milk is then poured from the largest glass to the next smaller and it fits!
Again pours the milk into the next smaller one and finally into the smallest glass without missing one drop!

✔ The amount of milk is always perfect.
✔ From glass to glass, the milk fills to the brim, never too much and never too little!

Difficulty: Beginner Instructions in paper