Finum Disposable Paper Tea Filter Bags for Loose Tea, White, Slim, 100 Count The Finum disposable tea filters of natural FSC-certified fibers, come in various sizes  perfect for any cup or large pot. These tea filters can also be used without a filter holder as the filling flap facilitates the removal of the filter after brewing. The filter can be sealed in the manner of a tea bag by folding the filling flap and closing it with any filter holder, e.g. piercing the filter with the Filter Stick. Made with chlorine-free bleached, biodegradable paper This size S is for mugs.