We are often asked how we brew a single cup of hot tea at home. THIS IS IT! We have been using the same original kit for years. Unlike bags, this filter allows the larger loose leaves to fully expand so you can get all the flavors and health benefits for every ingredient. When you're done, simply empty the leaves into compost or trash and pop all the pieces in the dishwasher. We use ours so much that it is usually only thoroughly rinsed and set to the side to dry so it is ready for the next brewing. 

From the Finum website: Finest, heat resistant Borosilicate Glass. The filter allows tea leaves to expand and develop their body. While gently steeping your tea, the hat prevents heat loss and retains the aroma. When the brewing has finished the hat serves as a practical drip-off tray for the brewing basket.