Mastering the chasen: how to use and care for your matcha whisk

Your chasen does more work than it looks like. Hand-carved from a single piece of bamboo, its tines curved inward by heat and tension to create the even foam that makes a properly whisked matcha so distinct.

Treat it well and it keeps rewarding you. Here's how.

Mastering the Matcha Flask

Matcha is traditionally whisked in a bowl with a bamboo chasen, requiring time and technique. The T2 Matcha Flask reimagines that ritual: shake it, and the hidden stainless steel whisk creates a smooth, suspended blend. Double-wall insulation keeps matcha at around 60°C (140°F) for up to six hours, and the leakproof, slim profile fits most car cup holders.

Step-by-step guide

Remove the lid and whisk from the flask, then add 1 teaspoon of T2 Matcha.

If you prefer a sweeter cup, try T2's range of flavoured matchas.

Add 200ml (6.7fl oz) of water at 80°C (176°F). Allow to vent for 1 minute.

Fill the flask just over halfway with water, leaving room for milk, then tightly screw the whisk and lid on.

Shake the flask about 20 times. Count to 10 before opening to let the matcha settle, then remove the lid.

The more you shake, the smoother and creamier the result. Top with warm milk and honey to taste, or use cold milk and ice for iced matcha.

Care and use

Don't fill the flask more than three-quarters full with hot water. This leaves enough room for the matcha to mix properly without overflowing.
The flask is not suitable for the microwave or dishwasher. Wash in warm, soapy water.
Avoid dropping the flask. This can damage the internal vacuum seal that keeps it leak-free and heat-retaining.
The vacuum seal keeps your drink at around 60°C (140°F) for up to six hours.

Don't fill the flask more than three-quarters full with hot water.
This leaves enough room for the matcha to mix properly without overflowing.
The flask is not suitable for the microwave or dishwasher. Wash in warm, soapy water.
Avoid dropping the flask.
This can damage the internal vacuum seal that keeps it leak-free and heat-retaining.
The vacuum seal keeps your drink at around 60°C (140°F) for up to six hours.