teeli's fibrous filters contain mainly woodpulp and hemp fibers, which contribute to taste neutrality. All fibers are either bleached with oxygen or hydrogen peroxide. There's little question of the superior quality of orthodox tea over CTC tea used for teabags. Brew to the desired strenght and then easily remove it to stop brewing along with the tea.

The design of the finum flip filter is patented in that the back is longer that the front. This forms a kind of a slide shape, which makes filling it up with tea easier and neater. No filter holder is needed - the filter can just be held with the lid of the tea pot. During the brewing process, the bottom fold is opened which increases the extraction. Filters are available in four different sizes - the large being for use with for standard teapots, and for large teapots and herbal teas.