A two-way tea-leaf compartment - Brew and Filter - allows you to choose how long to brew your tea by a simple flip mechanism that separates the leaves from the tea, preventing the bitter taste of over-brewing. The lid infuser can be used as a filter when steeping floral tea or fruit tea with more tea ingredients. This clever design makes it easy to keep your freshly brewed tea in the mug, without any unwanted bits and pieces.