To make the tea, bring 300ml of water to a boil in a saucepan. Add the tea bags and let them steep for 5 minutes. Remove the tea bags and stir in sugar until it dissolves.

In a separate pot, boil 500ml of water. Once boiling, add tapioca pearls and gently stir. Cook for 5 minutes, stirring occasionally. Turn off the heat and let it sit for another 5 minutes. Drain and rinse the tapioca pearls with cold running water.

Combine the brewed tea, milk, and ice cubes in a cocktail shaker. Shake well until the mixture is frothy and well-mixed.

Add a handful of tapioca pearls to each glass. Pour the tea mixture over the pearls and stir gently. Serve immediately with a wide straw.