Leegoal (TM) Disposable Drawstring Seal Filter Empty Paper Tea Bags (White,M Size,Set of 100) Size:6.2x9.8cm/2.4x3.8inch,easy to carry Ways of seal off:seal it off by string.Draw string closure Suitable for tea,coffe,spice and herbal powder Easy to fill and remove:you can tie a knot to close it up,and throw it easily Natural materials,No using hot iron or electric iron