This elegant tea tumbler is perfect for tea on the go or at the office! The inside is made of porcelain with an airtight lid and a removable stainless steel filter. To use, simply unscrew the lid, place tea leaves in infuser and add hot water. Once tea has steeped for the desired amount of time, remove the infuser and drink right out of the tumbler. For continuous infusion teas, remove the infuser before adding tea leaves and add water as desired. Holds approximately 8 oz.